`Math.sqrt()`

Returns the square root of a number.

Syntax

Math.sqrt(x)

Name	Type	Required	Description
`x`	`number`	Yes	The number whose square root is returned.

number — The square root of x, or NaN if x is negative.

console.log(Math.sqrt(144));

Output

console.log(Math.sqrt(-1));

Output

NaN

Returns NaN for negative inputs (no complex numbers). `Math.sqrt(2)` gives an irrational approximation. Use `Math.cbrt` for cube roots.