C Program to Reverse an Array

In this tutorial you will learn about the C Program to Reverse an Array and its application with practical example.

C Program to Reverse an Array.

In this tutorial, we will learn to create a C program that will reverse an Array Using C programming.

Table Of Contents−

C Program to Reverse an Array.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following C programming topics:

Operators in C Programming.
Basic Input and Output function in C Programming.

Basic C programming.
For loop in C programming.
Arithmetic operations in C Programming.

Reversing an Array:-

In this program, First, we will first take the size of the array from the user. Then we will take the elements of the array from the user. Then we will copy elements of the array. After that, we will reverse the array using the for-loop. Then we will print the reverse of the original array to the user.

With the help of this program, we can be reverse an Array.

Program Code:-

/* C Program to Reverse an Array */
#include <stdio.h>
int main()
{
   //declaring the required variables for the program.
   int num, i, j, array1[50], array2[50];
   //num = it will hold the integer value for the program.
   //i = it will hold the integer value for the loop.
   //array1 = it will hold the integer value for the program.
   //array2 = it will hold the integer value for the program.
   
   //Taking the number of elements of the array.
   printf("Enter no of elements in array\n");
   scanf("%d", &num);
   //Taking the elements of the array.
   printf("Enter array elements\n");
   for (i = 0; i < num ; i++)
      scanf("%d", &array1[i]);
   //First will Copying elements into array
   for (i = num - 1, j = 0; i >= 0; i--,j++)
      array2[j] = array1[i];
   //Then we will Copying reversed array into the original
   for (i = 0; i < num; i++)
      array1[i] = array2[i];
   //Printing the required variables for the program.
   printf("The reversed array:\n");
   for (i = 0; i< num; i++)
      printf("%d\n", array1[i]);
   return 0;
}

/* C Program to Reverse an Array */

#include <stdio.h>

int main()

{

//declaring the required variables for the program.

int num, i, j, array1[50], array2[50];

//num = it will hold the integer value for the program.

//i = it will hold the integer value for the loop.

//array1 = it will hold the integer value for the program.

//array2 = it will hold the integer value for the program.

//Taking the number of elements of the array.

printf("Enter no of elements in array\n");

scanf("%d", &num);

//Taking the elements of the array.

printf("Enter array elements\n");

for (i = 0; i < num ; i++)

scanf("%d", &array1[i]);

//First will Copying elements into array

for (i = num - 1, j = 0; i >= 0; i--,j++)

array2[j] = array1[i];

//Then we will Copying reversed array into the original

for (i = 0; i < num; i++)

array1[i] = array2[i];

//Printing the required variables for the program.

printf("The reversed array:\n");

for (i = 0; i< num; i++)

printf("%d\n", array1[i]);

return 0;

}

Output:-

In the above program, we have first initialized the required variable.

array1[] = it will hold the integer value.
i = it will hold the integer value.

j = it will hold the integer value.
num = it will hold the integer value.
array2[] = it will hold the integer value.

Taking the size of the array and the elements.

Program Code to Reverse an Array.

Printing output of the program.

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