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Number Triangle in C++

A number triangle in C++ is a pattern of numbers printed in the form of a triangle. Typically, each row of the triangle contains a sequence of numbers that follow a specific pattern. You can create various number triangles depending on the pattern you want to achieve. Here’s an example of a simple number triangle in C++:

C++
#include <iostream>

int main() {
    int n;

    // Input the number of rows for the triangle
    std::cout << "Enter the number of rows: ";
    std::cin >> n;

    // Loop to print the number triangle
    for (int i = 1; i <= n; ++i) {
        // Print spaces for formatting
        for (int j = 1; j <= n - i; ++j) {
            std::cout << "  ";
        }

        // Print numbers in ascending order
        for (int k = 1; k <= i; ++k) {
            std::cout << k << " ";
        }

        // Print numbers in descending order (excluding 1)
        for (int l = i - 1; l >= 1; --l) {
            std::cout << l << " ";
        }

        // Move to the next line
        std::cout << std::endl;
    }

    return 0;
}

In this example, the program prompts the user to enter the number of rows for the number triangle. It then uses nested loops to print the numbers in a triangular pattern. Each row contains ascending and descending numbers, with spaces for formatting.

For example, if you enter 5 as the number of rows, the program will generate the following output:

Plaintext
    1 
   1 2 1 
  1 2 3 2 1 
 1 2 3 4 3 2 1 
1 2 3 4 5 4 3 2 1 

You can modify the pattern and the number of rows to create different types of number triangles according to your requirements.

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