How many types of loops in javascript

JavaScript supports several types of loops that allow you to execute a block of code repeatedly. Here are explanations for the seven main types of loops in JavaScript.

1. for loop:

   The for loop is used when you know the number of iterations beforehand. It consists of three optional parts: initialization, condition, and iteration statement.

                   
                       for (let i = 0; i < 5; i++) {
                           // Code to be executed in each iteration
                         }                      
                   
               

2. while loop:

   The while loop is used when the number of iterations is not known in advance. It continues executing the block of code as long as the specified condition is true.

                   
                       let i = 0;
                       while (i < 5) {
                         // Code to be executed in each iteration
                         i++;
                       }                    
                   
               

3. do-while loop:

   Similar to the while loop, the do-while loop executes the block of code at least once before checking the condition. It continues executing as long as the condition is true.

                   
                       let i = 0;
                       do {
                         // Code to be executed in each iteration
                         i++;
                       } while (i < 5);                    
                   
               

4. for...in loop:

   The for...in loop is used to iterate over the enumerable properties of an object. It assigns each property key to a variable in each iteration.

                   
                       const object = { a: 1, b: 2, c: 3 };
                       for (const key in object) {
                         // Code to be executed for each property in the object
                       }                    
                   
               

5. for...of loop:

   The for...of loop iterates over the values of an iterable object, such as an array, string, or other iterable. It assigns each value to a variable in each iteration.

                   
                       const array = [1, 2, 3, 4, 5];
                       for (const element of array) {
                         // Code to be executed for each element in the array
                       }                    
                   
               

6. forEach loop (Array method):

   The forEach method is a loop specifically for arrays. It iterates over each element of an array and executes a provided function for each.

                   
                       const array = [1, 2, 3, 4, 5];
                       array.forEach(function(element) {
                         // Code to be executed for each element in the array
                       });                    
                   
               

7. map loop (Array method):

   The map method is another array method that creates a new array by applying a function to each element of the original array.

                   
                       const array = [1, 2, 3, 4, 5];
                       const newArray = array.map(function(element) {
                         // Code to transform each element
                         return transformedValue;
                       });                    
                   
               

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