C program to generate hollow diamond star pattern

In this tutorial, we will discuss the C program to generate hollow diamond star pattern

In this program, we are going to learn how to display hollow diamond star pattern using for loop in C programming language

Here, we display a hollow diamond star pattern program with coding using nested for loop and also we get input from the user using Scanf() function in C language

the user can provide numbers as they wish and get the hollow diamond star pattern according to their input.

Display Hollow Diamond Pattern using for loop

Program 1

#include <stdio.h>
#include <stdlib.h>

int main()
{
     int i,j,rows;
    printf("Enter the number of rows: \n");
    scanf("%d",&rows);//get input from user

//print upper triangle

for(i=1; i<=rows; i++){
    for(j=rows; j>i; j--){
       printf(" ");//print space
    }
    printf("*");//print star
    for(j=1; j<(i-1)*2; j++){
       printf(" ");
    }
    if(i==1){
      printf("\n");//move to next line
    }
    else{
      printf("*\n");
    }
}

//print lower triangle
for(i=rows-1; i>=1; i--){
    for(j=rows; j>i; j--){
       printf(" ");//print space
    }
    printf("*");
    for(j=1; j<(i-1)*2; j++){
      printf(" ");
    }
    if(i==1){
      printf("\n");//move to next line
    }
    else{
      printf("*\n");
    }
    }

    return 0;
}

When the above code executed, it produces the following results

Enter the number of rows: 6
          *
        *   *
      *       *
    *           *
  *               *
*                   *
  *                *
    *           *
      *       *
        *   *
          *

Display Hollow Diamond Pattern using while loop

In this program, we are going to learn how to displayed hollow diamond star pattern using while loop in C programming language

here, we display a hollow diamond star pattern program with coding using nested while loop and also we get input from the user using Scanf() function in C language

the user can provide numbers as they wish and get the hollow diamond star pattern according to their input

Program 2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,j, rows;
    printf("Enter the number of rows\n");
    scanf("%d",&rows);//get input from user
    i=1;
//print upper triangle
    while(i<=rows){
    j=rows;
    while( j>i){
       printf(" ");//print space
        j--;
    }
    printf("*");//print star
    j=1;
    while(j<(i-1)*2){
       printf(" ");
        j++;
    }
    if(i==1){
      printf("\n");
    }
    else{
      printf("*\n");
    }
     i++;
}

//print lower triangle
    i=rows-1;
while(i>=1){
    j=rows;
    while(j>i){
       printf(" ");//print space
        j--;
    }
    printf("*");//print star
    j=1;
    while(j<(i-1)*2){
       printf(" ");
        j++;
    }
    if(i==1){
      printf("\n");//move to next line
    }
    else{
      printf("*\n");
    }
     i--;
    }
getch();
    return 0;
}

When the above code executed, it produces the following results

Enter the number of rows: 6
          *
        *   *
      *       *
    *           *
  *               *
*                   *
  *                *
    *           *
      *       *
        *   *
          *

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