C program to swap first and last digit of a number; Through this tutorial, we will learn how to swap first and last digit of a number in c programs.
Programs to Swap First and Last Digit Of a Number in C
- Program 1 – C Program to Swap First and Last Digit Of a Number
- Program 2 – C Program to Swap First and Last Digit Of a Number
Program 1 – C Program to Swap First and Last Digit Of a Number
/* C Program to Swap First and Last Digit Of a Number */
#include <stdio.h>
#include <math.h>
int main()
{
int Number, FirstDigit, DigitsCount, LastDigit, a, b, SwapNum;
printf("\n Please Enter any Number that you wish : ");
scanf("%d", & Number);
DigitsCount = log10(Number);
FirstDigit = Number / pow(10, DigitsCount);
LastDigit = Number % 10;
a = FirstDigit * (pow(10, DigitsCount));
b = Number % a;
Number = b / 10;
SwapNum = LastDigit * (pow(10, DigitsCount)) + (Number * 10 + FirstDigit);
printf(" \n The Number after Swapping First Digit and Last Digit = %d", SwapNum);
return 0;
}
The output of the above c program; as follows:
Please Enter any Number that you wish : 456 The Number after Swapping First Digit and Last Digit = 654
Program 2 – C Program to Swap First and Last Digit Of a Number
/* C Program to Swap First and Last Digit Of a Number */
#include <stdio.h>
#include <math.h>
int main()
{
int Number, FirstDigit, DigitsCount, LastDigit, a, b, SwapNum;
printf("\n Please Enter any Number that you wish : ");
scanf("%d", & Number);
DigitsCount = log10(Number);
FirstDigit = Number / pow(10, DigitsCount);
LastDigit = Number % 10;
SwapNum = LastDigit;
SwapNum = SwapNum * (round(pow(10, DigitsCount)));
SwapNum = SwapNum + Number % (int)(round(pow(10, DigitsCount)));
SwapNum = SwapNum - LastDigit;
SwapNum = SwapNum + FirstDigit;
printf(" \n The Number after Swapping First Digit and Last Digit = %d", SwapNum);
return 0;
}
The output of the above c program; as follows:
Please Enter any Number that you wish : 586 The Number after Swapping First Digit and Last Digit = 685
