Problem Solving using C Language

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Loops

Lab: for Loop Patterns

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Pattern 1: Print Right-Angle Triangle
For N = 5:

*
* *
* * *
* * * *
* * * * *

#include <stdio.h>

int main() {
  int N;

  printf("Enter a number: ");
  scanf("%d", &N);

  for (int i = 1; i <= N; i++) {
    for (int j = 1; j <= i; j++) {
      printf("* ");
    }
    printf("\n");
  }

  return 0;
}

Pattern 2: Print Inverted Right-Angle Triangle

For N = 5:

* * * * *
* * * *
* * *
* *
*

#include <stdio.h>

int main() {
  int N;

  printf("Enter a number: ");
  scanf("%d", &N);

  for (int i = N; i >= 1; i--) {
    for (int j = 1; j <= i; j++) {
      printf("* ");
    }
    printf("\n");
  }

  return 0;
}