CC For Loop

C For Loop

When you know exactly how many times you want to loop through a block of code, use the for loop instead of a while loop:

for (statement 1; statement 2; statement 3) {
  // code block to be executed
}

• Statement 1 is executed (one time) before the execution of the code block.
• Statement 2 defines the condition for executing the code block.
• Statement 3 is executed (every time) after the code block has been executed.

#include <stdio.h>

int main() {
  int i;
  
  for (i = 0; i < 5; i++) {
    printf("%d\n", i);
  }
  
  return 0;
}

#include <stdio.h>

int main() {
  int i, j;
  
  // Outer loop
  for (i = 1; i <= 2; ++i) {
    printf("Outer: %d\n", i);  // Executes 2 times
    
    // Inner loop
    for (j = 1; j <= 3; ++j) {
      printf(" Inner: %d\n", j);  // Executes 6 times (2 * 3)
    }
  }
  
  return 0;
}