Trying to make a simple javascript calculator and having a problem. How can i delete only one number when i press < 999 when press < we got 99 like this sorry for bad Englesh.
function run1(){
document.case.display.value += "1"
};
function run2(){
document.case.display.value += "2"
};
function run3(){
document.case.display.value += "3"
};
function run4(){
document.case.display.value += "4"
};
function run5(){
document.case.display.value += "5"
};
function run6(){
document.case.display.value += "6"
};
function run7(){
document.case.display.value += "7"
};
function run8(){
document.case.display.value += "8"
};
function run9(){
document.case.display.value += "9"
};
function run0(){
document.case.display.value += "0"
};
function runPlus(){
document.case.display.value += "+"
};
function runMinus(){
document.case.display.value += "-"
};
function runDivide(){
document.case.display.value += "/"
};
function runMultiply(){
document.case.display.value += "*"
};
function runComma(){
document.case.display.value += "."
};
function runBack(){
document.case.display.value -= "2"
};
function runC(){
document.case.display.value = ""
};
function runEquals() {
if (document.case.display.value == "") {
document.case.display.value = ""
} else {
var equals = eval(document.case.display.value)
document.case.display.value = equals;
}
} not (display) {
margin: 0;
padding: 0;
border: 0;
outline: 0;
font-size: 16px;
vertical-align: baseline;
background: transparent;
}
body {
line-height: 1;
}
ul {
list-style: none;
}
body {
width: 500px;
}
form {
background-color: 080808;
text-align: center;
padding: 7px;
}
#display {
width: 98%;
height: 30px;
text-align: right;
font-size: 1.5rem;
}
.digit {
font-size: 2rem;
background-color: gray;
height: 55px;
width: 20%;
border-radius: 5px;
display: inline-block;
padding: 5px;
}
.oper {
font-size: 2rem;
background-color:green ;
height: 55px;
width: 20%;
border-radius: 5px;
display: inline-block;
padding: 5px;
}
#clearMem {
background-color: red;
}
#equal {
background-color: yellow;
width: 82%;
} <html>
<head>
<title>Calculator Project</title>
<link rel="stylesheet" href="main.css" type="text/css">
<script src="main.js" type="text/javascript"></script>
</head>
<body>
<form name="case">
<input name="display" id="display" value="">
<input type="button" class="digit" value="1" onclick="run1()">
<input type="button" class="digit" value="2" onclick="run2()">
<input type="button" class="digit" value="3" onclick="run3()">
<input type="button" id="plus" class="oper" value="+" onclick="runPlus()">
<input type="button" class="digit" value="4" onclick="run4()">
<input type="button" class="digit" value="5" onclick="run5()">
<input type="button" class="digit" value="6" onclick="run6()">
<input type="button" id="minus" class="oper" value="-" onclick="runMinus()" >
<input type="button" class="digit" value="7" onclick="run7()">
<input type="button" class="digit" value="8" onclick="run8()">
<input type="button" class="digit" value="9" onclick="run9()">
<input type="button" id="divide" class="oper" value="/" onclick="runDivide()" >
<input type="button" class="digit" value="0" onclick="run0()">
<input type="button" id="comma" class="digit" value="." onclick="runComma()">
<input type="button" id="clearMem" class="oper" value="CE" onclick="runC()">
<input type="button" id="multiply" class="oper" value="*" onclick="runMultiply()">
<input type="button" id="back" class="oper" value="<" onclick="runBack()">
<input type="button" id="equal" class="oper" value="=" onclick="runEquals()">
</body>Maybe we can split out with 10 we maybe need Math.ceil() 69/10 = 6.9 = 6
6.99/10 = 0.699 = it is 0 or 1 too i need only one number been deleted.
