JavaScript Looping Array Elements🚀(Thread).
1. The for loop:
for loop is used when you want to execute a block of code as long as a specified condition is true.
Syntax :
Examples:
for loop is used when you want to execute a block of code as long as a specified condition is true.
Syntax :
Examples:
2. for Each:
The forEach() method calls a function (a callback function) once for each array element.
Syntax :
Example:
Note:- the function takes 3 arguments:
The item value.
The item index.
The array itself.
The example below uses only the value parameter.
The forEach() method calls a function (a callback function) once for each array element.
Syntax :
Example:
Note:- the function takes 3 arguments:
The item value.
The item index.
The array itself.
The example below uses only the value parameter.
3. for...of:
The for...of statement creates a loop Iterating over iterable objects , invoking a custom iteration hook with statements to be executed for the value of each distinct property.
Syntax:
Example:
The for...of statement creates a loop Iterating over iterable objects , invoking a custom iteration hook with statements to be executed for the value of each distinct property.
Syntax:
Example:
4. for...in:
The for...in statement loops over all of an object's enumerable properties that are keyed by strings (ignoring those keyed by Symbols), including inherited enumerable properties.
Syntax:
Example:
The for...in statement loops over all of an object's enumerable properties that are keyed by strings (ignoring those keyed by Symbols), including inherited enumerable properties.
Syntax:
Example:
5. map :
The map() method will iterate through the Array elements individually and it will perform some Operations.
Operations might be: Printing, Finding the length of the String, Concatenation, etc.
The method creates a new array by performing a function on each array element
The map() method will iterate through the Array elements individually and it will perform some Operations.
Operations might be: Printing, Finding the length of the String, Concatenation, etc.
The method creates a new array by performing a function on each array element
The map() method does not execute the function for array elements without values.
The map() method does not change the original array.
Example:
The map() method does not change the original array.
Example:
6. reduce()
The reduce() method runs a function on each array element to produce (reduce it to) a single value.
The reduce() method works from left to right in the array.
The reduce() method does not reduce the original array.
The reduce() method runs a function on each array element to produce (reduce it to) a single value.
The reduce() method works from left to right in the array.
The reduce() method does not reduce the original array.
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