trim to 2 decimals
I have:
onclick="document.getElementById('field1').value =
Math.round((parseFloat(document.getElementById('field2').value,2)*100))/100 +
Math.round((parseFloat(document.getElementById('field3').value,2)*100))/100;"
Most numbers round ok to 2 decimal points which is what I need.
However, with an example like
onclick="document.getElementById('field1').value =
Math.round((parseFloat(document.getElementById('21.29').value,2)*100))/100 +
Math.round((parseFloat(document.getElementById('54.70').value,2)*100))/100;"
Field 1 is returning 75.99000000000001 How can I trim to 75.99 con开发者_运维技巧sistently?
var num = 5 / 6;
var display = num.toFixed(2)
num outputs: 0.8333333333333334
display outputs: "0.83"
How about this:
parseFloat(document.getElementById('21.29').toFixed(2));
The toFixed method should take care of the rounding nicely for you.
Use the method toFixed(2) to fix it at 2 decimal places:
(Math.round((parseFloat(document.getElementById('21.29').value,2)*100))/100 +
Math.round((parseFloat(document.getElementById('54.70').value,2)*100))/100).toFixed(2);
I had a similar issue - where I do not wanted to round the value but trim upto 2 decimals
I got the perfect solution for by writing this function and using where ever needed to trim upto 2 decimals
function upto2Decimal(num) {
if (num > 0)
return Math.floor(num * 100) / 100;
else
return Math.ceil(num * 100) / 100;
}
if you call
upto2Decimal(2.3699) or upto2Decimal(-2.3699)
// returns 2.36 or -2.36
check this solution using your JS console of the browser
You can use :
function myFunction()
{
var num = "-54.987656";
var roundedValue = roundMethod(num,5);
document.getElementById("demo").innerHTML = roundedValue;
}
function roundMethod(numberVal, roundLimit) // This method will not add any additional 0, if decimal places are less than the round limit
{
var isDecimal = numberVal.indexOf(".") != -1;
if(isDecimal)
{
if(numberVal.split(".")[1].length > roundLimit)
{
return parseFloat(numberVal).toFixed(roundLimit).toString();
}else
{
return numberVal;
}
}else
{
return numberVal;
}
}<html>
<body>
<p>Click the button to display the fixed number.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
</body>
</html>
加载中,请稍侯......
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