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Number toPrecision() Method with Example in JavaScript
JavaScript Number toPrecision() Method: Here, we are going to learn about the toPrecision() method with example.
Submitted by IncludeHelp, on February 20, 2019
Number toPrecision() Method
toPrecision() method is a method of Number class, it is used to convert a number to a specified length, including the decimal point (if target length is short).
Syntax:
Number.toPrecision(n);
Here, n is used to define the length of the number.
Examples:
Input: 10
num = 123.456
Function call Output
num.toPrecision(8) 123.45600
num.toPrecision(5) 123.45
num.toPrecision(4) 123.4
Code:
<html>
<head>
<title>JavaScipt Example</title>
</head>
<body>
<script>
var num = 123.456;
var res1 = num.toPrecision(3);
var res2 = num.toPrecision(4);
var res3 = num.toPrecision(5);
var res4 = num.toPrecision(6);
var res5 = num.toPrecision(7);
var res6 = num.toPrecision(8);
document.write("res1 = " + res1 + "<br>");
document.write("res2 = " + res2 + "<br>");
document.write("res3 = " + res3 + "<br>");
document.write("res4 = " + res4 + "<br>");
document.write("res7 = " + res5 + "<br>");
document.write("res6 = " + res6 + "<br>");
</script>
</body>
</html>
Output
res1 = 123
res2 = 123.5
res3 = 123.46
res4 = 123.456
res7 = 123.4560
res6 = 123.45600
JavaScript Number Object Methods »