Decode School

Decode School - The School for Problem Solvers
Welcome to My Blog.
Need Assignment / Project Guidance (or) Training in Python?

C Program to print the first digit of a given number

Get input num and display the first digit of number num

Sample Input 1:


Sample Output 1:


Program or Solution

int main()
	int n,num;
	printf("%d is the first digit in %d",num,n);
	return 0;

Program Explanation

Instruction(s) inside the while block{} are executed repeatedly till expression (num>=10) is true.

Divide the number num by 10 untill it becomes lesser than 10.

once it is less than 10 print the num using printf statement.

statement num = num/10 divides the num by 10 repeatedly untill it num is less than 10.