C Program to Find Sum of First and Last Digit of any Number2 min read

In this tutorial, we will learn, how to find the sum of the first and last digit of a number in C. We will see two examples with different approaches. Before that, you should have knowledge of the following topics in C.


C Program to Find Sum of First and Last Digit of any Number using loop

Output:

Enter the Number: 325
Sum of first and last digit of entered Number: 8

Now if you enter a number with only one digit, the program will take that single digit as a firstDigit as well as lastDigit and add them both as shown below.

Enter the Number: 2
Sum of first and last digit of entered Number: 4


C Program to Find Sum of First and Last Digit of any Number without using loop

Output:

Enter the Number: 964
Sum of first and last digit of entered Number: 13

Note: log10() is a mathematical function present in math.h header file. It returns the log base 10 value of the passed parameter to log10() function.


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