For Loop

for (expression 1; expression 2; expression 3) { // code block to be executed }

Example of For Loop

for(let i = 0; i < arr.length; i++){ // code block to be executed }

For In Loop

for (key in object) { // code block to be executed }

Example of For In Loop 

for (let x in arr) { // code block to be executed }

For Of Loop 

for (variable of iterable) { // code block to be executed }

Example of For Of Loop 

for (let x of arr) { // code block to be executed }

While Loop

while (condition) { // code block to be executed }

 Example of While Loop

while (i < 10) { // code block to be executed i++; }

$ npm i -g @nestjs/cli $ nest new project-name