C Program to Swap First and Last Digit of a Number using While loop

Write C Program to Swap First and Last Digit of a Number using While loop

//Wap to swap first and last digit of a number

#include <stdio.h>
#include <math.h>

int main()
{
	long int n;
	int first, end, swap, digit, divide;

	printf("Enter the number :--> ");//for eg: 5623
	scanf("%ld", &n);

	digit = log10(n);  // 3

	divide = pow(10,digit); //1000

	first = n / divide; //5
	n = n % divide; //623
	end = n % 10; //3

	n = n / 10; //562

	swap = end * divide + n * 10 + first;  //3 * 1000 + 623 * 10 + 5
	printf("Swap value is : %d", swap);

	return 0;
}

Output:

Enter the number :--> 123546
Swap value is : 623541

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