Cpp program to display patterns using do while loop

Cpp program to display patterns using do while loop

In this tutorial, we will discuss the concept of Cpp program to display patterns using do while loop.

In Cpp language, we can use for loop, while loop, do-while loop to display various number, star, alphabet and binary number patterns

In this topic, we demonstrate how to display print some number and star patterns using the nested do-while loop in Cpp language.

Program 1

Rectangle number pattern

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    int i=0;
    do{
        int j=1;
        while(j<=7)
        {
           cout<<j;
            j++;
        }
        cout<<"\n";
        i++;
    }
    while(i<=7);
    getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

1234567
1234567
1234567
1234567
1234567
1234567
1234567
1234567

Program 2

Rectangle star pattern

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    int i=0;
    do{
        int j=1;
        while(j<=7)
        {
           cout<<"*";
            j++;
        }
        cout<<"\n";
        i++;
    }
    while(i<=7);
    getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

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

 

Program 3

Triangle number pattern

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int row=1,column=1;
    int i;
    do{
    do{
            i--;
        }while(i>=row);
        column=1;
        do{
                cout<<column;
                cout<<" ";
        column++;
    }while(column<=row);
            cout<<"\n";
            row++;
    }while(column<=8);
    getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6 7
1 2 3 4 5 6 7 8

 

 

 

Program 3

Triangle star pattern

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int row=1,column=1;
    int i;
    do{
    do{
            i--;
        }while(i>=row);
        column=1;
        do{
                cout<<"*";
                cout<<" ";
        column++;
    }while(column<=row);
            cout<<"\n";
            row++;
    }while(column<=8);
    getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

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

 

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