- Categories: JavaScript Methods, JavaScript Reference, Reference
Quick Reference
The Number toPrecision() method formats a number to a specified length, adding a decimal point and zeroes if necessary to achieve the length.
<!-- html element to place output -->
<p id="my_output"></p>
// variables
let my_value = 123.45;
let my_number = my_value.toPrecision(7);
// output to the HTML element
document.getElementById('my_output').innerHTML = my_number;
Output
123.4500
Syntax
number.toPrecision(x)
Parameters
| Parameter | Description |
|---|---|
| x | The number of digits; if omitted, the number is returned without any formatting |
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JAVASCRIPT NOTES:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
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