In this tutorial, we will discuss How to create hollow triangle pattern in C programming language
We can print many types of Floyd’s triangle pattern using nested for loop in C language
We describe four hollow patterns in this post
Pattern 1
#include <stdio.h> #include <stdlib.h> int main() { int i,j,rows;//variable declaration //Input row value from user printf("Enter of rows you want\n"); scanf("%d",&rows); for(i=1; i<=rows; i++){//parent for loop for(j=i; j<=rows; j++){//print columns if(i==1 || j==i || j==rows){ printf("*"); } else{ printf(" "); } } printf("\n");//move to next line } getch(); return 0; }
When the above code is executed, it produces the following results:
Program 2
#include <stdio.h> #include <stdlib.h> int main() { int i,j,rows;//variable declaration //Input row value from user printf("Enter of rows you want\n"); scanf("%d",&rows); for(i=1; i<=rows; i++){//parent for loop, for row of hollow triangle for(j=1; j<=i; j++){//print columns if(j==1 || j==i || i==rows){ printf("*"); } else{ printf(" "); } } printf("\n");//move to next line } getch(); return 0; }
When the above code is executed, it produces the following results:
Program 3
#include <stdio.h> #include <stdlib.h> int main() { int i,j,rows;//variable declaration printf("Enter the number of rows you want: "); scanf("%d",&rows);//get input from user for rows for(i=1; i<=rows; i++){ for(j=1; j<i; j++){ printf(" "); } for(j=i; j<=rows; j++){ if(j==i || j==rows || i==1){ printf("*"); } else{ printf(" "); } } printf("\n");//move to next line for iterate } getch(); return 0; }
Program 4
#include <stdio.h> #include <stdlib.h> int main() { int i,j,rows; printf("Enter the number of rows you want: "); scanf("%d",&rows);//get input from user for rows for(i=1; i<=rows; i++){ for(j=i; j<rows; j++){ printf(" ");//print space for triangle } for(j=1; j<=i; j++){ if(i==rows || j==1 || j==i){ printf("*"); } else{ printf(" "); } } printf("\n");//move to next line for iterate } getch(); return 0; }
When the above code is executed, it produces the following results:
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