Loops in C Programming for Beginners with Examples

Loops in C Programming

Loops in C programming are used to execute a block of code repeatedly until a condition is satisfied. They help reduce code repetition and make programs efficient.

Types of Loops in C

  • for loop
  • while loop
  • do-while loop

1. for Loop

The for loop is used when the number of iterations is known.

Syntax:


for(initialization; condition; update) {

   // code

}

Example:


#include <stdio.h>

int main() {

   int i;

   for(i = 1; i <= 5; i++) {

      printf("%d\n", i);

   }

   return 0;

}

This program prints numbers from 1 to 5.

2. while Loop

The while loop executes code while the condition is true.

Syntax:


while(condition) {

   // code

}

Example:


#include <stdio.h>

int main() {

   int i = 1;

   while(i <= 5) {

      printf("%d\n", i);

      i++;

   }

   return 0;

}

3. do-while Loop

The do-while loop executes the code at least once, even if the condition is false.

Syntax:


do {

   // code

} while(condition);

Example:


#include <stdio.h>

int main() {

   int i = 1;

   do {

      printf("%d\n", i);

      i++;

   } while(i <= 5);

   return 0;

}

Why Loops Are Important

  • Reduce code repetition
  • Make programs efficient
  • Used in almost every real-world program

Conclusion

Loops help execute code multiple times based on conditions. After learning loops, the next step is control statements like break and continue.

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