Page 85 - JavaScript

console.log(min); // Logs: 1

Restrict Number to Min/Max Range

If you need to clamp a number to keep it inside a specific range boundary

function clamp(min, max, val) {
return Math.min(Math.max(min, +val), max);
}

console.log(clamp(-10, 10, "4.30")); // 4.3
console.log(clamp(-10, 10, -8)); // -8
console.log(clamp(-10, 10, 12)); // 10
console.log(clamp(-10, 10, -15)); // -10

Use-case example (jsFiddle)

Getting roots of a number

Square Root

Use Math.sqrt() to find the square root of a number

Math.sqrt(16) #=> 4

Cube Root

To find the cube root of a number, use the Math.cbrt() function

6

Math.cbrt(27) #=> 3

Finding nth-roots

To find the nth-root, use the Math.pow() function and pass in a fractional exponent.

Math.pow(64, 1/6) #=> 2

Read Arithmetic (Math) online: https://riptutorial.com/javascript/topic/203/arithmetic--math-

https://riptutorial.com/ 42