Print square Pattern in C language

C-Pattern-Programs

In this article, we are going to learn about how to print Print square Pattern in C language of “*” and numbers. Pattern programs are a good exercise to master the loops in the C language. Here in this example

we will try to print two types of patterns.


  • Using * , print a square matrix box where user enters the size.
  • Using Numbers , print a square matrix box where user enters the size.

Print start square pattern


In this example, we will print the square matrix with the help of for loop and “*” asterisk character. User will enter the size of this square matrix box and we will print the box with the help of “*”.

First, we are asking the user to enter his desired size, once the user enters the size we save it in a variable. Then we iterate on two for loops to the max of this input value from the user. For each iteration, we are printing the “*” n times for the nth iteration. On each row iteration, we switch to the next line using “\n”.

Desired Output for size 3:-

* * *
* * *
* * *
#include<stdio.h>
int main()
{
   int num;

   printf("Please enter the size of Square Box: ");
   scanf("%d",&num);

   for(int row=1; row<=num; row++)
   {
     for(int col=1; col<=num; col++)
     {
       printf("* ");
     }
     printf("\n");
   }
   return 0;
}

Output

Please enter the size of Square Box: 5
* * * * * 
* * * * * 
* * * * * 
* * * * * 
* * * * * 

Print number square pattern


This is another variant of the program above, to print a square matrix box. In this example, we will not make use of “*” instead we will use the actual numbers. So the logic will remain the same as in the above example, the only change will be the output characters from * to numbers.

Desired Output of size 3:-
1 2 3
1 2 3
1 2 3

#include<stdio.h>
int main()
{
   int num;

   printf("Please enter the size of Square Box: ");
   scanf("%d",&num);

   for(int row=1; row<=num; row++)
   {
     for(int col=1; col<=num; col++)
     {
       printf("%3d",col);
     }
     printf("\n");
   }

   return 0;
}

Output

Please enter the size of Square Box: 5
  1  2  3  4  5
  1  2  3  4  5
  1  2  3  4  5
  1  2  3  4  5
  1  2  3  4  5