how to reverse an array in c code example

Example 1: reverse array in c

// arr is the array
// a is length of array
int j = a-1;
for(int i = 0; i<j; i++){
	arr[i]^=arr[j];
    arr[j]^=arr[i];
    arr[i]^=arr[j];
    j--;
}

Example 2: how to reverse a number in c

#include <stdio.h>
int main() {
    int n, rev = 0, remainder;
    printf("Enter an integer: ");
    scanf("%d", &n);
    while (n != 0) {
        remainder = n % 10;
        rev = rev * 10 + remainder;
        n /= 10;
    }
    printf("Reversed number = %d", rev);
    return 0;
}