C Program to Print Numbers 1 to 10 Using While & Do-While Loop [Step-by-Step]

📋 C Program to Print 1 to 10 - Quick Overview

📑 What You'll Learn in This Tutorial

• ✅ Print 1 to 10 using While Loop
• ✅ Print 1 to N using Do-While Loop
• ✅ Program Output & Explanation
• ✅ Practice Assignments

Ever wondered how computers count? Whether you're just starting your programming journey or brushing up on your C skills, loops are everywhere—and once you master them, you'll be able to write code that repeats tasks effortlessly. In this guide, we're going to tackle a classic beginner exercise: printing numbers from 1 to 10 using two of the most important loop structures in C—the while loop and the do-while loop.

Think of loops like a chef repeating a recipe step over and over until a dish is ready. In programming, we use loops to repeat actions without writing the same code a hundred times. Pretty neat, right? Here, we'll start with a simple counter, print it out, increase it by one, and keep going until we hit our target. The while loop is like checking the recipe first—"Do we still need to cook?" If yes, keep going. The do-while loop, on the other hand, is like taking a taste first and then checking if more cooking is needed—it always runs at least once.

Printing 1 to 10 with a While Loop (The "Check First" Approach)

Imagine you're counting on your fingers. You start at 1, say it out loud, then move to 2, and so on until you reach 10. That's exactly what this program does—but in C, of course!

We begin by declaring a variable j and setting it to 1. This is our counter. Then, the while loop checks: "Is j still less than or equal to 10?" If the answer is yes, it prints the current value of j and increases it by 1. This dance continues until j becomes 11, at which point the condition fails and the loop gracefully bows out. The result? A clean print of 1 through 10.

Printing 1 to N with a Do-While Loop (The "Run First" Approach)

Now, what if you want to let the user decide how far to count? That's where the do-while loop shines. Instead of hardcoding 10, we ask the user for a number n. The loop then prints from 1 all the way up to n.

Here's the cool part: the do-while loop always executes its body at least once before checking the condition. So even if someone enters 0 (which would normally break a while loop), this loop would still print 1 before stopping. It's like a persistent little worker that always shows up for duty at least one time. In our case, if the user enters 15, the output will be 1 through 15. If they enter 10, you get 1 through 10. Simple, flexible, and powerful.

💻 C Program Code to Print Numbers from 1 to 10 Using While Loop

#include <stdio.h>

int main(){    int j = 1;
          Copy
          Run
          printf("Series....:\n");

while(j <= 10)
{
    printf("%d ", j);
    j++;
}

printf("\n");
return 0;
      }

📌 Output

Series....:
1 2 3 4 5 6 7 8 9 10

🧠 How This Program Works (Step-by-Step)

• Step 1: We create a variable j and give it the starting value of 1—like setting the first domino.
• Step 2: The program prints the header "Series....:" so you know the numbers are coming.
• Step 3: The while loop checks if j is still 10 or less. As long as it is, the loop runs.
• Step 4: Inside the loop, we print j to the screen. The first time, that's 1.
• Step 5: We then increase j by 1 using j++. So it becomes 2, then 3, and so on.
• Step 6: Once j hits 11, the condition j <= 10 becomes false. The loop stops, and the program says "I'm done!" and prints a newline. End of story.

Related Programs: Even Numbers | Factorial Using While | Prime Numbers

💻 C Program Code to Print Numbers from 1 to N Using Do-While Loop

#include <stdio.h>

int main(){    int j = 1, n;
          Copy
          Run
          printf("\nEnter the limit for the series: ");
scanf("%d", &n);

printf("Series....:\n");

do {
    printf("%d ", j);
    j++;
} while(j <= n);

printf("\n");
return 0;
      }

📌 Output

Enter the limit for the series: 10
Series....:
1 2 3 4 5 6 7 8 9 10

🧠 How This Program Works (Step-by-Step)

• Step 1: The program asks you, "Hey, how far do you want to count?" You type a number, and it gets stored in n.
• Step 2: We set j back to 1—fresh start!
• Step 3: The do-while loop kicks in. It doesn't check anything first; it just jumps right in and prints j.
• Step 4: After printing, it increases j by 1 and then—now it checks: "Is j still less than or equal to n?"
• Step 5: If yes, it goes back and prints the next number. If no, it stops and the program ends with a cheerful newline.
• Step 6: The beauty of this is that even if you accidentally enter 0, the loop will still run once (printing 1) before it realizes it should stop. That's the do-while magic!

🤔 Complete FAQ - Supporting Questions

Primary Question: "How to print 1 to 10 in C?"

🚀 Practice Question

Okay, time to put your skills to the test. Try modifying this program to do the following:

• Print only odd numbers from 1 to N
• Print only even numbers from 1 to N
• Calculate and print the sum of all odd numbers within a given range

Hint: You'll need to add an if condition inside the loop to check whether a number is odd or even. Give it a shot—you've got this!