Number.toPrecision
toPrecision — Returns a string representation of the specified Number object.
Description
Number.toPrecision([integer precision])
Parameters
| Name |
Description |
Type |
Default |
Optional |
| precision |
A numeric value between 1 and 21 specifying the number of significant digits. |
integer |
|
Yes |
Return values
The returned value will be of the primitive string type.
Examples
Example #1 – toPrecision example
var n = new Number(1.12345678901234567890);
console.log(n.toPrecision()); // 1.1234567890123457
console.log(n.toPrecision(1)); // 1
console.log(n.toPrecision(3)); // 1.12
console.log(n.toPrecision(5)); // 1.1235
console.log(n.toPrecision(8)); // 1.1234568
Example #2 – toPrecision example
var n = new Number(4242);
console.log(n.toPrecision()); // 4242
console.log(n.toPrecision(1)); // 4e+3
console.log(n.toPrecision(3)); // 4.24e+3
console.log(n.toPrecision(5)); // 4242.0
console.log(n.toPrecision(8)); // 4242.0000
External references