Number Functions in JavaScript

JavaScript has a number of methods for performing operations on numbers. Here are some common methods:

1. parseInt() and parseFloat():

Parses a string and returns an integer or floating-point number.

JavaScript

let intNumber = "42";
console.log(parseInt(intNumber)); // Output: 42

let floatNumber = "3.14";
console.log(parseFloat(floatNumber)); // Output: 3.14

2. toFixed():

Formats a number to a specified number of decimal places.

JavaScript

let num = 3.14159;
console.log(num.toFixed(2)); // Output: "3.14"

3. toString():

Converts a number to a string.

JavaScript

let num = 42;
console.log(num.toString()); // Output: "42"

4. Math.round():

Rounds a number to the nearest integer.

JavaScript

console.log(Math.round(4.7)); // Output: 5
console.log(Math.round(4.3)); // Output: 4

5. Math.ceil() and Math.floor():

Rounds a number up or down to the nearest integer.

JavaScript

console.log(Math.ceil(4.3));  // Output: 5
console.log(Math.floor(4.7)); // Output: 4

6. Math.min() and Math.max():

Returns the smallest or largest number in a list of arguments.

JavaScript

console.log(Math.min(10, 20, 30)); // Output: 10
console.log(Math.max(10, 20, 30)); // Output: 30

7. Math.random():

Generates a random number between 0 (inclusive) and 1 (exclusive).

JavaScript

console.log(Math.random()); // Output: A random decimal, e.g., 0.345678

8. Math.abs():

Returns the absolute value of a number.

JavaScript

let num = -42;
console.log(Math.abs(num)); // Output: 42

9. Math.pow() and Math.sqrt():

Calculates power and square root.

JavaScript

console.log(Math.pow(2, 3)); // Output: 8 (2^3)
console.log(Math.sqrt(16));  // Output: 4

10. Number.isInteger():

Checks if a value is an integer.

JavaScript

console.log(Number.isInteger(42)); // Output: true
console.log(Number.isInteger(3.14)); // Output: false

JavaScript Number Functions in JavaScript

JavaScript