Star Patterns
C program to print right arrow star pattern
Write a C program to print right arrow star pattern series using for loop. How to print right arrow star pattern structure in C program. Logic to print right arrow star pattern in C programming.
Example
Input
Input N: 5
Output
***** **** *** ** * ** *** **** *****
Required knowledge
Basic C programming, For loop, Nested loop
Logic to print right arrow star pattern
This pattern is a combination of two patterns hence, let's first divide it into two parts.
***** **** *** ** * ** *** **** *****
If you have noticed total number of spaces in upper part is 2*rownumber - 2 per row and bottom part contains total 2*n - 2*rownumber spaces per row (where n is the total number of rows). If you ignore leading spaces, then the upper part star pattern is similar to inverted right triangle star pattern and bottom part to simple right triangle star pattern which I already explained how to print.
Program to print right arrow star pattern
/** * C program to print right arrow star pattern */ #include <stdio.h> int main() { int i, j, n; // Input number of rows from user printf("Enter value of n : "); scanf("%d", &n); // Print the upper part of the arrow for(i=1; i<n; i++) { // Print trailing (2*rownumber-2) spaces for(j=1; j<=(2*i-2); j++) { printf(" "); } // Print inverted right triangle star pattern for(j=i; j<=n; j++) { printf("*"); } printf("\n"); } // Print lower part of the arrow for(i=1; i<=n; i++) { // Print trailing (2*n - 2*rownumber) spaces for(j=1; j<=(2*n - 2*i); j++) { printf(" "); } // Print simple right triangle star pattern for(j=1; j<=i; j++) { printf("*"); } printf("\n"); } return 0; }
Output
Enter value of n : 5
***** **** *** ** * ** *** **** *****