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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <body>

    <div class="container">

        <!-- <div class="display"> 

        <div class="top-display">
            <h3 id='main-display'></h3>
        </div> -->

        <div class="bot-display">
            <h2 id='input-display'></h2>
        </div>

        <!-- </div> -->

        <div class="key-pad">

            <button id="clear"> &#67; </button>
            <button id="sign"> &#45;&#47;&#43; </button>
            <button id="percent"> &#37; </button>
            <button id="divide" class="last-char"> &#247; </button>

        </div>

        <div class="key-pad">

            <button id="seven"> &#55; </button>
            <button id="eight"> &#56; </button>
            <button id="nine"> &#57; </button>
            <button id="mult" class="last-char"> &#42; </button>

        </div>

        <div class="key-pad">

            <button id="four"> &#52; </button>
            <button id="five"> &#53; </button>
            <button id="six"> &#54; </button>
            <button id="sub" class="last-char"> &#45; </button>

        </div>

        <div class="key-pad">

            <button id="one"> &#49; </button>
            <button id="two"> &#50; </button>
            <button id="three"> &#51; </button>
            <button id="add" class="last-char"> &#43; </button>

        </div>

        <div class="key-pad-last">

            <button id="zero"> &#48; </button>
            <button id="period"> &#46; </button>
            <button id="delete"> DEL </button>
            <button id="equal" class="last"> &#61; </button>

        </div>

    </div>


</body>

            
          
!
            
              body {
    background-color: #1D2225;
    margin: 0px;
    padding: 0px;
    color: white;
}


/* .container */

.container {
    height: 555px;
    width: 414px;
    /* border: 1px solid gray; */
    margin: 10% auto;
    border-radius: 2px;
    -webkit-box-shadow: 0px 0px 144px 30px rgba(0, 0, 0, 0.49);
    -moz-box-shadow: 0px 0px 144px 30px rgba(0, 0, 0, 0.49);
    box-shadow: 0px 0px 144px 30px rgba(0, 0, 0, 0.49);
}


/* .display */

.display {
    height: 250px;
    background-color: #FAFAFA;
    margin-bottom: 0;
    border-top-left-radius: 2px;
    border-top-right-radius: 2px;
}

.top-display {
    text-align: right;
    background-color: #FAFAFA;
    color: black;
    font-size: 2rem;
    /* margin: 0px 0px; */
    height: 150px;
    /* padding: 20px 30px; */
    border-bottom: 1px solid black;
    /* border: 2px solid black; */
}

/*#main-display {
    padding: 50px 20px;
    border: 1px solid black;
    height: 0px; 
}*/

.bot-display {
    text-align: right;
    background-color: #FAFAFA;
    color: black;
    font-size: 24px;
    /* margin: 0px 0px; */
    height: 100px;
    padding: 25px 20px;
    /* border: 1px solid white; */
}


/* keys */

.key-pad {
    border-bottom: 1px solid #A1A2A2;
    font-size: 0px
    /* padding: 0px 10px; */
}

.key-pad-last {
    border-bottom: none;
    font-size: 0;
    /* padding: 0px 10px; */
}


/* buttons */

button {
    border-top: none;
    border-bottom: none;
    border-left: none;
    border-right: 1px solid #A1A2A2;
    background-color: #1D2225;
    color: #D0D2D4;
    font-size: 30px;
    text-decoration: none;
    height: 80px;
    width: 25%;
    font-family: 'Quicksand', sans-serif;
    font-weight: 300;
    /* margin-left: 8px; */
}

.last-char, .last {
    background-color: #5E4BB5;
    border-right: none;
}

/*
.last {
     background-color: #FEC208;
    background-color: #5E4BB5;
}
 */


/*
.last-char {
    border-right: 1px solid #A1A2A2;
}

ul {
    display: inline-block;
}

li {
    display: inline;
    height: 100px;
}



ul li {
    margin: auto;
    font-size: 2rem;
    padding: 5%;
} */
            
          
!
            
              //////////////////////////////////////////////////////////// GLOBAL ////////////////////////////////////////////////////////////////////////////
var s = ''; //initializing string to be evaluated


// var digitsArray = [];
// var result = 0;

//variable operatos to be disabled or enable
var percent = document.getElementById('percent'); 
var divide  = document.getElementById('divide'); 
var mult    = document.getElementById('mult');
var sub     = document.getElementById('sub');
var add     = document.getElementById('add');
var period  = document.getElementById('period');
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////Digits or numbers ///////////////////////////////////////////////////////////////////////////////

document.getElementById('one').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = one;
    // digitsArray.push(1);
    
    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 1;
    holder();
});

document.getElementById('two').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = two;
    // digitsArray.push(2);

    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 2;
    holder();
});

document.getElementById('three').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = three;
    // digitsArray.push(3);

    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 3;
    holder();
});

document.getElementById('four').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = four;
    // digitsArray.push(4);

    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 4;
    holder();
});

document.getElementById('five').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = five;
    // digitsArray.push(5);

    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 5;
    holder();
});

document.getElementById('six').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = six;
    // digitsArray.push(6);

    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 6;
    holder();
});

document.getElementById('seven').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = seven;
    // digitsArray.push(7);

    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 7;
    holder();
});

document.getElementById('eight').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = eight;
    // digitsArray.push(8);

    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 8;
    holder();
});

document.getElementById('nine').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = nine;
    // digitsArray.push(9);

    // enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 9;
    holder();
});

document.getElementById('zero').addEventListener('click', function() {
    // document.getElementById('input-display').innerText = zero;
    // digitsArray.push(0);

    //enables operators if a number is pressed.
    percent.disabled = false;
    divide.disabled  = false;
    mult.disabled    = false;
    sub.disabled     = false;
    add.disabled     = false;
    period.disabled  = false;
    s += 0;
    holder();
});
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////// Operators ///////////////////////////////////////////////////////////////////////////////
document.getElementById('percent').addEventListener('click', function() {
    
    //disables the operators if the operatos are pressed.
    percent.disabled = true; 
    divide.disabled  = true;
    mult.disabled    = true;   
    sub.disabled     = true;    
    add.disabled     = true;    
    period.disabled  = true; 
    s += '%';
    holder();
});

document.getElementById('divide').addEventListener('click', function() {
    //   var diver = document.getElementById('main-display').innerHTML = digitsArray.join('');
    //   diver = parseInt(diver, 10);
    //   digitsArray = [];
    //   document.getElementById('input-display').innerHTML = "";
    //   totalResult(result);

    //disables the operators if the operatos are pressed.
    percent.disabled = true; 
    divide.disabled  = true;
    mult.disabled    = true;   
    sub.disabled     = true;    
    add.disabled     = true;    
    period.disabled  = true;
    s += '/';
    holder();
});

document.getElementById('mult').addEventListener('click', function() {
    //   var multer = document.getElementById('main-display').innerHTML = digitsArray.join('');
    //   multer = parseInt(multer, 10);
    //   digitsArray = [];
    //   document.getElementById('input-display').innerHTML = "";
    //   totalResult(result);

    //disables the operators if the operatos are pressed.
    percent.disabled = true; 
    divide.disabled  = true;
    mult.disabled    = true;   
    sub.disabled     = true;    
    add.disabled     = true;    
    period.disabled  = true;
    s += '*';
    holder();
});

document.getElementById('sub').addEventListener('click', function() {
    // var suber = document.getElementById('main-display').innerHTML = digitsArray.join('');
    // suber = parseInt(suber, 10);
    // digitsArray = [];
    // document.getElementById('input-display').innerHTML = "";
    // totalResult(result);

    //disables the operators if the operatos are pressed.
    percent.disabled = true; 
    divide.disabled  = true;
    mult.disabled    = true;   
    sub.disabled     = true;    
    add.disabled     = true;    
    period.disabled  = true;
    s += '-';
    holder(); 
});

document.getElementById('add').addEventListener('click', function() {
    // var adder = document.getElementById('main-display').innerHTML = digitsArray.join('');
    // adder = parseInt(adder, 10);
    // digitsArray = [];
    // document.getElementById('input-display').innerHTML = "";
    // totalResult(result);

    //disables the operators if the operatos are pressed.
    percent.disabled = true; 
    divide.disabled  = true;
    mult.disabled    = true;   
    sub.disabled     = true;    
    add.disabled     = true;    
    period.disabled  = true;
    s += '+';
    holder();
});

document.getElementById('period').addEventListener('click', function() {
    
    //disables the operators if the operatos are pressed.
    percent.disabled = true; 
    divide.disabled  = true;
    mult.disabled    = true;   
    sub.disabled     = true;    
    add.disabled     = true;    
    period.disabled  = true;
    s += '.';
    holder();
});
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


////////////////////////////////////////////////////// keys ///////////////////////////////////////////////////////////////////////////////

document.getElementById('delete').addEventListener('click', function() {
    // digitsArray.pop();
    // holder();

    //deletes the last entered character
    s = s.substr(0, s.length -1);
    document.getElementById('input-display').innerHTML = s;
});

document.getElementById('equal').addEventListener('click', function() {
    
    // document.getElementById('main-display').innerHTML = eval(s);

    //displays the evaluated string.
    document.getElementById('input-display').innerHTML = eval(s);

    //enables the button if pressed
    percent.disabled = false; 
    divide.disabled  = false;
    mult.disabled    = false;   
    sub.disabled     = false;    
    add.disabled     = false;    
    period.disabled  = false;

    //clears the string variable
    s = '';
   
    //  document.getElementById('input-display').innerHTML = '';
    
});

document.getElementById('sign').addEventListener('click', function() {

});

document.getElementById('clear').addEventListener('click', function() {
    
    //clears the displays
    document.getElementById('input-display').innerHTML = "";
    //document.getElementById('main-display').innerHTML = "";
    s = '';
    // digitsArray = [];
    
});
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////// FUNCTIONS ///////////////////////////////////////////////////////////////////////////////

// function totalResult(val) {
//     document.getElementById('main-display').innerHTML = val;
//     // console.log(val, 'looooggg');
// }

//function to display the string.
function holder() {
    // var res = document.getElementById('input-display').innerHTML = digitsArray.join('');
    var res = document.getElementById('input-display').innerHTML = s;
}

// checkStr('1+2/');

// function checkStr(string) {

// var add = string[string.length -1] === '+';
// var div = string[string.length -1] === '/';
// var sub = string[string.length -1] === '-';
// var mult = string[string.length -1] === '*';

// console.log( add || div || sub || mult );


//if the condition is true then disable. 

//check nov 3.

//}
            
          
!
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