Display hollow diamond star pattern in Cpp

In this tutorial, we will discuss Display hollow diamond star pattern in Cpp

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 cin function in C++ language

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

Hollow diamond star pattern using for loop

Program 1

#include <iostream>
#include <conio.h>

using namespace std;

int main()
{
    int i,j,rows;
    cout<<"Please enter the number of rows\n";
    cin>>rows;//get input from user
    //loop for display upper half part of the pattern
for(i=1; i<=rows; i++){
    for(j=i; j<=rows; j++){
       cout<<"*";//print star
    }

    for(j=1; j<=(2*i-2); j++){
       cout<<" ";//print space
    }
    for(j=i; j<=rows; j++){
       cout<<"*";//print star
    }
    cout<<"\n";
}
    //loop for printing lower half part  of the pattern
for(i=1; i<=rows; i++){
    for(j=1; j<=i; j++){
       cout<<"*";//print star
    }

    for(j=(2*i-2); j<(2*rows-2); j++){
       cout<<" ";//print space
    }
    for(j=1; j<=i; j++){
       cout<<"*";
    }
    cout<<"\n";//move to next line
    }
    getch();
    return 0;
    }

When the above code executed, it produces the following results

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

Hollow diamond star pattern using while loop

In this program, we are going to learn how to displayed hollow diamond star pattern using while loop or 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 using Cin 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 <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int i,j,rows;
    cout<<"Enter the number of rows: \n";
    cin>>rows;
    i=1;
while(i<=rows){
j=i;
    while(j<=rows){
       cout<<"*";//print star
        j++;
    }
j=1;
    while(j<=(2*i-2)){
       cout<<" ";//print space
        j++;
    }
    j=i;
    while(j<=rows){
      cout<<"*";//print star
        j++;
    }
    cout<<"\n";
     i++;
}
    //loop for printing lower half part  of the pattern
    i=1;
while(i<=rows){
j=1;
    while(j<=i){
       cout<<"*";//print star
        j++;
    }
    j=(2*i-2);
    while(j<(2*rows-2)){
       cout<<" ";//print space
        j++;
    }
    j=1;
    while(j<=i){
       cout<<"*";
        j++;
    }
    cout<<"\n";//move to next line
     i++;
    }
getch();
    return 0;
}

When the above code executed, it produces the following results

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

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