C Program to Reversing an Array Elements in C Programming

Data Structure Array (Article) Array (Program)

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Program:

#include<stdio.h>

int main() {
   int arr[30], i, j, num, temp;

   printf("\nEnter no of elements : ");
   scanf("%d", &num);

   //Read elements in an array
   for (i = 0; i < num; i++) {
      scanf("%d", &arr[i]);
   }

   j = i - 1;   // j will Point to last Element
   i = 0;       // i will be pointing to first element

   while (i < j) {
      temp = arr[i];
      arr[i] = arr[j];
      arr[j] = temp;
      i++;             // increment i
      j--;          // decrement j
   }

   //Print out the Result of Insertion
   printf("\nResult after reversal : ");
   for (i = 0; i < num; i++) {
      printf("%d \t", arr[i]);
   }

   return (0);
}

Output:

Enter no of elements : 5
11 22 33 44 55
Result after reversal : 55 44 33 22 11

Explanation:

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