C Program to reverse an array using another array

C-Array

In this article, we are going to learn how to reverse arrays element-wise in C language. We will take an array and then we will reverse its elements one by one and will display the fully reversed array.

1. C Program to reverse an array using another array


#include <stdio.h>
int main()
{


   int arr[10], num ;

   printf("Please enter the Size of array with Max size 10: ");
   scanf("%d",&num);

   printf("Please enter the elements in this Array: ");
   for(int i=0; i < num; i++)
      scanf("%d",&arr[i]);

  int reverseArr[num];


  int i = 0;
  int j = num-1;

  while(j>=0) 
  {
   reverseArr[i] = arr[j];
   i++; 
   j--; 
  }

  printf("\nThe Reverse of array entered by you is: \n");

  for (int i = 0; i < num; ++i)
  {
   	printf("%d ", reverseArr[i]);
  }

  return 0;
}

Output

Please enter the Size of array with Max size 10: 5
Please enter the elements in this Array: 3 6 9 12 15\ 

The Reverse of array entered by you is: 
15 12 9 6 3 

2. C Program to reverse an array using another array while loop


#include <stdio.h>
int main()
{


   int arr[10], num ;

   printf("Please enter the Size of array with Max size 10: ");
   scanf("%d",&num);

   printf("Please enter the elements in this Array: ");
   for(int i=0; i < num; i++)
      scanf("%d",&arr[i]);

  int reverseArr[num];

   for (int i = 0, j=num-1; j>=0; i++, j--)
   {
      reverseArr[i] = arr[j];
   }

  printf("\nThe Reverse of array entered by you is: \n");

  for (int i = 0; i < num; ++i)
  {
   	printf("%d ", reverseArr[i]);
  }

  return 0;
}

Output

Please enter the Size of array with Max size 10: 5
Please enter the elements in this Array: 3 6 9 12 15

The Reverse of array entered by you is: 
15 12 9 6 3