Diamond Pattern || palindrome number || patterns || for loop || C++

In this, we are going to see how to print the above pattern of Diamond of palindrome numbers, using nested for loops in C++.


The code given below can be used for TURBO C++ Compiler:-

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

void main()
{
    clrscr();
    int a = 1, num, space;
    cout << "Enter the number of Rows \n";
    cin >> num;
    space = num - 1;
    while (space != 0)
    {
        cout << " ";
        space--;
    }
    cout << a << "\n";
    space = num - 2;
    for (int i = 1; i < num; i++)
    {
        a = 1;
        for (int k = 1; k <= space; k++)
        {
            cout << " ";
        }
        for (int j = 0; j <= i * 2; j++)
        {
            if (j < i)
            {
                cout << a;
                a++;
            }
            else
            {
                cout << a;
                a--;
            }
        }
        cout << "\n";
        space--;
    }
    for (int i = num - 1; i >= 1; i--)
    {
        space = num - i;
        a = 1;
        for (int k = 1; k <= space; k++)
        {
            cout << " ";
        }
        for (int j = 1; j <= i * 2 - 1; j++)
        {
            if (j < i)
            {
                cout << a;
                a++;
            }
            else
            {
                cout << a;
                a--;
            }
        }
        cout << "\n";
        space--;
    }
    getch();
}
  
  

The code given below can be used for g++/gcc Compiler:-

// pattern 18
#include<iostream>
using namespace std;

int main()
{
    int a = 1, num, space;
    cout << "Enter the number of Rows \n";
    cin >> num;
    space = num - 1;
    while (space != 0)
    {
        cout << " ";
        space--;
    }
    cout << a << "\n";
    space = num - 2;
    for (int i = 1; i < num; i++)
    {
        a = 1;
        for (int k = 1; k <= space; k++)
        {
            cout << " ";
        }
        for (int j = 0; j <= i * 2; j++)
        {
            if (j < i)
            {
                cout << a;
                a++;
            }
            else
            {
                cout << a;
                a--;
            }
        }
        cout << "\n";
        space--;
    }
    for (int i = num - 1; i >= 1; i--)
    {
        space = num - i;
        a = 1;
        for (int k = 1; k <= space; k++)
        {
            cout << " ";
        }
        for (int j = 1; j <= i * 2 - 1; j++)
        {
            if (j < i)
            {
                cout << a;
                a++;
            }
            else
            {
                cout << a;
                a--;
            }
        }
        cout << "\n";
        space--;
    }
    return 0;
}
  
  
#ENJOY CODING


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