JavaScript .toPrecision()

The .toPrecision() method converts a number to a string of its specified precision form.

Syntax

num.toPrecision(precision);

Copy to clipboard
Copy to clipboard

• precision (optional): The number of significant digits.

Examples

Converting number to a string:

const pi = 3.14159;

console.log(pi.toPrecision(5)); // Output: 3.1415
console.log(pi.toPrecision(3)); // Output: 3.14
console.log(pi.toPrecision(1)); // Output: 3

Copy to clipboard
Copy to clipboard

To verify if it is a string:

const pi = 3.14159;

console.log(typeof pi.toPrecision());
// Output: string

Copy to clipboard
Copy to clipboard

Codebyte Example

Before running the program, what do you think the result will be?

Visit us
Visit us
Hide code
Code
Output
Hide output
Copy to your clipboard
Copy Codebyte
Run