Here is a C program to print rectangular star (*) pattern of n rows and m columns using for loop. For a rectangular star pattern of 5 rows and 9 columns. Program's output should be:
Required Knowledge
Algorithm to print rectangular star pattern using loop
- Take the number of rows(N) and columns(M) of rectangle as input from user using scanf function.
- We will use two for loops to print rectangular star pattern.
- Outer for loop will iterate N times. In each iteration, it will print one row of pattern.
- Inner for loop will iterate M times.In one iteration, it will print one star (*) characters in a row.
Here is the matrix representation of the rectangle star pattern. The row numbers are represented by i whereas column numbers are represented by j.
C program to print rectangular star pattern
#include<stdio.h>
int main(){
int rows, cols , i, j;
printf("Enter rows and columns of rectangle\n");
scanf("%d %d", &rows, &cols);
/* Row iterator for loop */
for(i = 0; i < rows; i++){
/* Column iterator for loop */
for(j = 0; j < cols; j++){
printf("*");
}
printf("\n");
}
return 0;
}
Output
Enter rows and columns of rectangle 3 9 ********* ********* *********
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