150+ JavaScript Pattern Programs

Introduction

Develop your creativity by creating beautiful asterisk patterns with if statements and loops using the JavaScript language. this awesome language will allow you to feel more comfortable writing code because you will master the more essential topics of programming by practicing these techniques.

If you are studying computer science at university, this book is perfect for you. They will require you to create these types of patterns that will be very useful to learn all types of advanced techniques and quickly master this wonderful language.

Pattern 1

// *****

// *****

// *****

// *****

// *****

for (let i = 1; i <= 5; i++) {

let row = '';

for (let j = 1; j <= 5; j++) {

row += '*';

}

console.log(row);

}

Pattern 2

// *

// **

// ***

// ****

// *****

for (let i = 1; i <= 5; i++) {

let row = '';

for (let j = 1; j <= i; j++) {

row += '*';

}

console.log(row);

}

Pattern 3

// *****

// ****

// ***

// **

// *

for (let i = 1; i <= 5; i++) {

let row = '';

for (let j = 5; j >= i; j—) {

row += '*';

}

console.log(row);

}

Pattern 4

//     *

//    **

//   ***

//  ****

// *****

const n = 5;

for (let i = 1; i <= n; i++) {

let row = '';

for (let j = n - 1; j >= i; j—) {

row += ' ';

}

for (let k = 1; k <= i; k++) {

row += '*';

}

console.log(row);

}

Pattern 5

// *****

//  ****

//   ***

//    **

//     *

const n = 5;

for (let i = n; i >= 1; i—) {

let spaces = '';

for (let j = n - 1; j >= i; j—) {

spaces += ' ';

}

let stars = '';

for (let k = 1; k <= i; k++) {

stars += '*';

}

console.log(spaces + stars);

}

Pattern 6

//     *

//    * *

//   * * *

//  * * * *

const p_height = 5;

for (let i = 1; i < p_height; i++) {

let spaces = '';

for (let k = p_height - 1; k >= i; k—) {

spaces += ' ';

}

let stars = '';

for (let j = 1; j <= i; j++) {

stars += '* ';

}

console.log(spaces + stars);

}

Pattern 7

// * * * * *

//  * * * *

//   * * *

//    * *

//     *

const p_height = 5;

for (let i = p_height; i >= 1; i—) {

let spaces = '';

for (let k = p_height - 1; k >= i; k—) {

spaces += ' ';

}

let stars = '';

for (let j = i; j >= 1; j—) {

stars += '* ';

}

console.log(spaces + stars);

}

Pattern 8

//     *

//    ***

//   *****

//  *******

// *********

const p_height = 5;

let min_stars = 1;

let p_space = p_height - 1;

for (let i = 0; i < p_height; i++) {

let spaces = '';

for (let j = p_space; j > i; j—) {

spaces += ' ';

}

let stars = '';

for (let k = 0; k < min_stars; k++) {

stars += '*';

}

min_stars += 2;

console.log(spaces + stars);

}

Pattern 9

// *********

//  *******

//   *****

//    ***

//     *

const p_height = 5;

let max_stars = p_height * 2 - 1;

let p_space = p_height - 1;

for (let i = p_height; i >= 1; i—) {

let spaces = '';

for (let j = p_space; j >= i; j—) {

spaces += ' ';

}

let stars = '';

for (let k = 1; k <= max_stars; k++) {

stars += '*';

}

max_stars -= 2;

console.log(spaces + stars);

}

Pattern 10

// *

// **

// ***

// ****

// ***

// **

// *

const size = 3;

for (let i = size; i >= -size; i—) {

let row = '';

for (let j = size; j >= Math.abs(i); j—) {

row += '*';

}

console.log(row);

}

Pattern 11

//    *

//   **

//  ***

// ****

//  ***

//   **

//    *

const size = 3;

for (let i = size; i >= -size; i—) {

let row = '';