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C Program to Find First and Last Digit of a Number

C Write a C program to find first and last digit of the user input number, without using looping.

Source Code: C Program to Find First and Last Digit of a Number

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  1.    
  2. #include < stdio.h >  
  3. #include < math.h >  
  4.   
  5. int main()  
  6. {  
  7.     int num, first, last, count;  
  8.   
  9.     printf("Enter an integer number\n");  
  10.     scanf("%d", &num);  
  11.   
  12.     count = log10(num);  
  13.   
  14.     first = num / pow(10, count);  
  15.     last  = num % 10;  
  16.   
  17.     printf("First Digit = %d\nLast Digit = %d\n", first, last);  
  18.   
  19.     return 0;  
  20. }  
Output 1:
Enter an integer number
123
First Digit = 1
Last Digit = 3
Output 2:
Enter an integer number
123456
First Digit = 1
Last Digit = 6
Output 3:
Enter an integer number
15937
First Digit = 1
Last Digit = 7
Output 4:
Enter an integer number
5986
First Digit = 5
Last Digit = 6
Output 5:
Enter an integer number
964801
First Digit = 9
Last Digit = 1

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