How do you reverse the contents of an array?

Solution Steps
  1. Place the two pointers (let start and end ) at the start and end of the array.
  2. Swap arr[start] and arr[end]
  3. Increment start and decrement end with 1.
  4. If start reached to the value length/2 or start ≥ end , then terminate otherwise repeat from step 2.

What is array order reversal?

The reverse method transposes the elements of the calling array object in place, mutating the array, and returning a reference to the array. reverse is intentionally generic; this method can be called or applied to objects resembling arrays.

How do you reverse an array without creating a new array?

Reverse an array of characters without creating a new array using java. If you want to reverse int array, you have to change public static void reverseArray(String[] array) as public static void reverseArray(int[] array) and String temp as int temp .

How do you reverse a string?

Method 1: Reverse a string by swapping the characters
  1. Input the string from the user.
  2. Find the length of the string. The actual length of the string is one less than the number of characters in the string. …
  3. Repeat the below steps from i = 0 to the entire length of the string.
  4. rev[i] = str[j]
  5. Print the reversed string.

How can I reverse an array in C++ without function?

Method 2: Without using an Extra Array

The logic to reverse an array without using another array in C++ is to swap 1st element with the last element, then the 2nd element with the 2nd last element, then 3rd, 4th… until we reach the middle element.

How do you reverse a string in an array in Java?

Method 3: Code to Reverse String Array in Java
  1. Convert the String Array to the list using Arrays. asList() method.
  2. Reverse the list using Collections.reverse() method.
  3. Convert the list back to the array using list. toArray() method.

How do you reverse a number?

How to reverse a number mathematically.
  1. Step 1 — Isolate the last digit in number. lastDigit = number % 10. …
  2. Step 2 — Append lastDigit to reverse. reverse = (reverse * 10) + lastDigit. …
  3. Step 3-Remove last digit from number. number = number / 10. …
  4. Iterate this process. while (number > 0)

What method is string class allows to reverse the given string?

Using StringBuffer: String class does not have reverse() method, we need to convert the input string to StringBuffer, which is achieved by using the reverse method of StringBuffer.

How do you reverse an array in C?

printf(“Array in reverse order: \n”); //Loop through the array in reverse order. for (int i = length-1; i >= 0; i–) { printf(“%d “, arr[i]);