C program to Print Number Pattern 1

In this article we will show you, How to write a C program to Print Number Pattern 1 with example. Or, C Program to Print Rectangle Number Pattern.

C program to Print Number Pattern 1 using For Loop

This program allows the user to enter the maximum number of rows and columns he/she want to print as a rectangle. Next, compiler will print the numbers from 1 to user specified rows.

/* C program to Print Number Pattern 1 */

#include<stdio.h>
 
int main()
{
    int i, j, rows, columns;
     
    printf(" \nPlease Enter the Number of Rows : ");
    scanf("%d", &rows);
    
    printf(" \nPlease Enter the Number of Columns : ");
    scanf("%d", &columns);
     
    for(i = 1; i <= rows; i++)
    {
    	for(j = 1; j <= columns; j++)
		{
			printf("%d", i);     	
        }
        printf("\n");
    }
    return 0;
}

OUTPUT

ANALYSIS

Let us see the Nested for loop

for(i = 1; i <= rows; i++)
{
   	for(j = 1; j <= columns; j++)
	{
		printf("%d", i);     	
        }
        printf("\n");
}

Outer Loop – First Iteration

From the above screenshot you can observe that, The value of i is 7 and the condition (i <= 7) is True. So, it will enter into second for loop

Inner Loop – First Iteration

The j value is 1 and the condition (1 <= 9) is True. So, it will start executing the statements inside the loop.

printf(" %d", i);

Following statement will be incremented by 1 using the Increment Operator

j++

This will happen until the condition inside the inner for loop fails. Next, iteration will start from beginning until both the Inner Loop and Outer loop conditions fails.

C program to Print Number Pattern 1 using while Loop

In this program we just replaced the For Loop with the While Loop. I suggest you to refer While Loop article to understand the logic.

/* C program to Print Number Pattern 1 */

#include<stdio.h>
 
int main()
{
    int i, j, rows, columns;
    i = 1;
     
    printf(" \nPlease Enter the Number of Rows : ");
    scanf("%d", &rows);
    
    printf(" \nPlease Enter the Number of Columns : ");
    scanf("%d", &columns);
     
    while(i <= rows)
    {
    	j = 1;
    	while(j <= columns)
		{
			printf("%d", i);       
			j++;     	
        }
        i++;
        printf("\n");
    }
    return 0;
}

OUTPUT

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