C Program for Input of Unsigned Integer Using Scanf() With Explanation

#include <stdio.h>
int main() {
unsigned int number;
printf("Enter an unsigned integer: ");
scanf("%u", &number);
printf("You entered: %u\n", number);
return 0;
}

Output:
Enter an unsigned integer: 4294967295
You entered: 4294967295
Description:
This small C program shows you how to get an unsigned integer input from the user using the scanf() function. Don’t worry if you’re new — we’ll break it down step by step in simple terms.

Include the Header File:
#include <stdio.h>
We need this so we can use printf() and scanf() — the basic functions to show messages and take input in C.

Start the Main Function:
int main()
Every C program starts here. This is where the program actually runs.

Declare the Variable:
unsigned int number;
An unsigned int means the variable only holds positive whole numbers — no negatives allowed.

Ask the User for Input:
printf("Enter an unsigned integer: ");
scanf("%u", &number);
First, the program asks you to enter a number. Then, scanf() reads what you type and saves it in the variable number. The %u tells it to expect an unsigned integer.

Show What You Entered:
printf("You entered: %u\n", number);
Finally, it prints back the number you typed, so you know the program got it right.

C Program to Input an Unsigned Integer using scanf() – Beginner Example

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