JavaScript, rounding numbers

gelthie · Oct 11, 2001

How can I round off numbers, like for the example below;

<title>JavaScript Calculation</title>
</head>
<body>
<script Language = "JavaScript">
var farentemp
farentemp=prompt("Please enter a temperature in Fahrenheit.","&quot

;
var celtemp
celtemp=(5/9)*(farentemp-32)
document.write("In Celsius, the temperature is &quot

;
document.write(celtemp);
document.write(" degrees!&quot

;
</script>

if I put in a temparature of 24 degrees Farenheit, it gives me something like -4.444444444444445. I am trying to figure out how to round it off to 2 decimals.
thanks

crazyboybert · Oct 11, 2001

ok here is one way though there are probably loads of ways of approaching this one...

var num = 1.234567

function roundNum(num){
n = num*100;
roundednum = Math.round

;
num = roundednum/100;
}

num would now equal 1.23

hope this helps

rob

crazyboybert · Oct 11, 2001

oh if you wanted to round off to three decimaals then you would multiply and divide by 1000 and so on....

gelthie · Oct 11, 2001

thanks

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JavaScript, rounding numbers

gelthie

Programmer

crazyboybert

Programmer

crazyboybert

Programmer

gelthie

Programmer

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