This shot discusses how to make a **diamond pattern** in `C++` with stars or `*` (asterisks).

# Method

We will use the #key# nested loop: loops within a loop #key# method to generate this pattern.

Let's look at the below image to understand this better.

To generate the pattern, as shown above, we will use two nested `for` loops.

The first `for` loop will generate the upper half of the diamond, while the second `for` loop will generate the bottom half of the diamond.

# Code

Let's look at the below code snippet to understand this better. The program requires a number as an input to generate a diamond accordingly.

#include <iostream>
using namespace std;

int main() {
  
  int number, space = 1;
  cin >> number;

  space = number - 1;
  
  for (int i = 1; i <= number; i++) {
    for (int j = 1; j <= space; j++)
    cout << " " ;
    space--;

    for (int j = 1; j <= 2*i-1; j++)
    cout << "*" ;
    cout << endl;
  }

  space = 1;
  for (int i = 1; i <= number-1; i++) {
    for (int j = 1; j <= space; j++)
    cout << " ";
    space++;
    
    for (int j = 1; j <= 2*(number-i)-1; j++)
    cout << "*";
    cout << endl;
  }
  
  return 0;
}

# Explanation

* *In line 6,* we initialize the `number` and `space` variables.

* *In line 7,* we use `cin >>` to take the input as `number`.

* *From lines 11 to 19,* we initialize nested `for` loops that use `*` to build the upper half of the diamond, i.e., the solid full pyramid.

* *From lines 22 to 30,* we initialize a second nested `for` loop that uses `*` to generate the lower half of the diamond, i.e., the inverted solid full pyramid.

In this way, we have learned to generate a diamond pattern with stars `*` in C++.

> We can also use numbers, alphabets, or any other characters to generate this pattern.

How to generate a solid diamond pattern with stars in C++

Generate a diamond pattern with stars in C++ using nested loops for upper and lower halves.