TypeScript Array reverse()
Syntax & Examples

Array.reverse() method

The reverse() method reverses the order of the elements in an array in place and returns the reference to the same array, with its elements reversed.

Syntax of Array.reverse()

The syntax of Array.reverse() method is:

reverse(): T[]

This reverse() method of Array reverses the elements in an array.

Return Type

Array.reverse() returns value of type T[].


✐ Examples

1 Using reverse() to reverse a numeric array

The reverse() method can be used to reverse the order of elements in a numeric array.

For example,

  1. Create an array arr with numeric values [1, 2, 3, 4, 5].
  2. Use reverse() to reverse the order of elements in the array.
  3. Log the reversed array arr to the console.

TypeScript Program

const arr = [1, 2, 3, 4, 5];
arr.reverse();
console.log(arr);

Output

[5, 4, 3, 2, 1]

2 Using reverse() to reverse a string array

The reverse() method can be used to reverse the order of elements in an array of strings.

For example,

  1. Create an array arr with string values ['apple', 'banana', 'cherry'].
  2. Use reverse() to reverse the order of elements in the array.
  3. Log the reversed array arr to the console.

TypeScript Program

const arr = ['apple', 'banana', 'cherry'];
arr.reverse();
console.log(arr);

Output

['cherry', 'banana', 'apple']

3 Using reverse() with a mixed data type array

The reverse() method can be used to reverse the order of elements in an array with mixed data types.

For example,

  1. Create an array arr with mixed values [1, 'apple', true, null].
  2. Use reverse() to reverse the order of elements in the array.
  3. Log the reversed array arr to the console.

TypeScript Program

const arr = [1, 'apple', true, null];
arr.reverse();
console.log(arr);

Output

[null, true, 'apple', 1]

Summary

In this TypeScript tutorial, we learned about reverse() method of Array: the syntax and few working examples with output and detailed explanation for each example.