C program to print diamond star pattern

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

In this post, we display two diamond patterns using nested for loop and nested while loop in C language

In this program, we will learn how to displayed diamond star pattern using for loop or nested for loop in C programming language

Here, we displayed the diamond 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 diamond star pattern according to their input

Star Diamond pattern using for loop

Program 1

Diamond star pattern 1

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

int main()
{
    int rows,i,j,Num_Of_space=1;
    printf("Enter the number of rows: ");
    scanf("%d",&rows);
//printing upper half triangle
    Num_Of_space=rows-1;

    for(i=1; i<=rows; i++){ //parent loop
        for(j=1; j<=Num_Of_space; j++)
            printf(" ");//this loop print initialy space 
            Num_Of_space--;

        for(j=1; j<=2*i-1; j++)
            printf("*");//this loop print star after space 

        printf("\n");//move to next line

    }
//Repeat again to print lower triangle
    Num_Of_space=1;//parent for loop
    for(i=1; i<=rows-1; i++){
            for(j=1; j<=Num_Of_space; j++)
            printf(" ");//print space before star
    Num_Of_space++;

        for(j=1; j<=2*(rows-i)-1; j++)
            printf("*");//print star after space
            printf("\n");

        }
getch();

When the above code executed, it produces the following results

Enter the number of rows: 5

        *
      ***
    *****
  *******
*********
  *******
    *****
      ***
        *

Star Diamond pattern using while loop

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

Here, we displayed a 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 diamond star pattern according to their input

Program 2

Diamond star pattern 2

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

int main()
{
    int i=1,j=1,rows;

    printf("Enter the mnumber of rows\n");
    scanf("%d",&rows);
    int space=rows-1;
    while(j<=rows){
        printf("\n");
        j=1;
        while(j<=space){
            printf(" ");
            j++;
        }
        j=1;
        while(j<=2*i-1){
            printf("*");
            j++;
        }
        i++;
        space--;
    }
    i=rows-1;
    space=1;
    while(i>=1){
        printf("\n");
        j=1;

        while(j<=space){
            printf(" ");
            j++;
        }
        j=1;
        while(j<=2*i-1){
            printf("*");
            j++;
        }
        i--;
        space++;
        }
        getch();
    return 0;
}

When the above code executed, it produces the following results

Enter the number of rows: 5

        *
      ***
    *****
  *******
*********
  *******
    *****
      ***
        *

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