Python Program to Print Right Triangle Number Pattern

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Given the number of rows(largest number) the task is to print the Right Triangle Number pattern in C, C++, and Python.

Examples:

Example1:

Input:

given number of rows of the right triangle = 11

Output:

1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5 
6 6 6 6 6 6 
7 7 7 7 7 7 7 
8 8 8 8 8 8 8 8 
9 9 9 9 9 9 9 9 9 
10 10 10 10 10 10 10 10 10 10 
11 11 11 11 11 11 11 11 11 11 11

Example2:

Input:

given number of rows of the right triangle = 9

Output:

1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5 
6 6 6 6 6 6 
7 7 7 7 7 7 7 
8 8 8 8 8 8 8 8 
9 9 9 9 9 9 9 9 9

Program to Print Right Triangle Number Pattern in C, C++, and Python

Below are the ways to print the Right Triangle Number Pattern in C, C++, and Python.

Method #1: Using For Loop (Static Input)

Approach:

  • Give the number of rows of the right-angled triangle Number pattern as static input and store it in a variable.
  • Loop from 1 to the number of rows using For loop.
  • Loop from 1 to first loop iterator value using another Nested For loop.
  • Print the iterator value of the parent loop with space in the inner For loop. (This prints the same number parent loop number of times)
  • Print the newline character after ending of inner For loop.
  • The Exit of the program.

1) Python Implementation

Below is the implementation:

# Give the number of rows of the right-angled triangle Number pattern
# as static input and store it in a variable.
triangleNum = 11
# Loop from 1 to the number of rows using For loop.
for m in range(1, triangleNum+1):
    # Loop from 1 to first loop iterator value using another Nested For loop.
    for n in range(1, m+1):
        # Print the iterator value of the nested loop with space in the inner For loop.
        # (This prints the same number parent loop number of times)
        print(m, end=' ')
    # Print the newline character after ending of inner For loop.
    print()

Output:

1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5 
6 6 6 6 6 6 
7 7 7 7 7 7 7 
8 8 8 8 8 8 8 8 
9 9 9 9 9 9 9 9 9 
10 10 10 10 10 10 10 10 10 10 
11 11 11 11 11 11 11 11 11 11 11

2) C++ Implementation

Below is the implementation:

#include <iostream>
using namespace std;

int main()
{

    // Give the number of rows of the right-angled triangle
    // Number pattern
    // as static input and store it in a variable.
    int triangleNum = 19;
    // Loop from 1 to the number of rows using For loop.
    for (int m = 1; m <= triangleNum;
         m++) { // Loop from 1 to first loop iterator value
                // using another Nested For loop.
        for (int n = 1; n <= m; n++) {
            // Print the star character with space in the
            // inner For loop.
            cout << m << " ";
        }
        // Print the iterator value of the parent loop with
        // space in the inner For loop.
        /*(This prints the same number parent loop number of
        times*/
        cout << endl;
    }

    return 0;
}

Output:

1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5 
6 6 6 6 6 6 
7 7 7 7 7 7 7 
8 8 8 8 8 8 8 8 
9 9 9 9 9 9 9 9 9 
10 10 10 10 10 10 10 10 10 10 
11 11 11 11 11 11 11 11 11 11 11 
12 12 12 12 12 12 12 12 12 12 12 12 
13 13 13 13 13 13 13 13 13 13 13 13 13 
14 14 14 14 14 14 14 14 14 14 14 14 14 14 
15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 
16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 
17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 
18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 
19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19

3) C Implementation

Below is the implementation:

#include <stdio.h>

int main()
{

    // Give the number of rows of the right-angled triangle
    // Number pattern
    // as static input and store it in a variable.
    int trianglerows = 9;
    // Loop from 1 to the number of rows using For loop.
    for (int m = 1; m <= trianglerows;
         m++) { // Loop from 1 to first loop iterator value
                // using another Nested For loop.
        for (int n = 1; n <= m; n++) {
            // Print the iterator value of the parent loop
            // with space in the inner For loop.
            //(This prints the same number parent loop
            //number of times)
            printf("%d ", m);
        }
        // Print the newline character after ending of inner
        // For loop.
        printf("\n");
    }
    return 0;
}

Output:

1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5 
6 6 6 6 6 6 
7 7 7 7 7 7 7 
8 8 8 8 8 8 8 8 
9 9 9 9 9 9 9 9 9

Method #2: Using For Loop (User Input)

Approach:

  • Give the number of rows of the right-angled triangle Number pattern as user input and store it in a variable.
  • Loop from 1 to the number of rows using For loop.
  • Loop from 1 to first loop iterator value using another Nested For loop.
  • Print the iterator value of the parent loop with space in the inner For loop. (This prints the same number parent loop number of times)
  • Print the newline character after ending of inner For loop.
  • The Exit of the program.

1) Python Implementation

  • Give the number of rows of the right-angled triangle Number pattern as user input using int(input()) and store it in a variable.

Below is the implementation:

# Give the number of rows of the right-angled triangle Number pattern as user input using int(input())
# and store it in a variable.
triangleNum = int(
    input('Enter some random number of rows of the triangle Number pattern ='))
# Loop from 1 to the number of rows using For loop.
for m in range(1, triangleNum+1):
    # Loop from 1 to first loop iterator value using another Nested For loop.
    for n in range(1, m+1):
        # Print the iterator value of the nested loop with space in the inner For loop.
        # (This prints the same number parent loop number of times)
        print(m, end=' ')
    # Print the newline character after ending of inner For loop.
    print()

Output:

Enter some random number of rows of the triangle Number pattern =12
1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5 
6 6 6 6 6 6 
7 7 7 7 7 7 7 
8 8 8 8 8 8 8 8 
9 9 9 9 9 9 9 9 9 
10 10 10 10 10 10 10 10 10 10 
11 11 11 11 11 11 11 11 11 11 11 
12 12 12 12 12 12 12 12 12 12 12 12

2) C++ Implementation

  • Give the number of rows of the right-angled triangle Number pattern as user input using cin and store it in a variable.

Below is the implementation:

#include <iostream>
using namespace std;

int main()
{

    // Give the number of rows of the right-angled triangle
    // Number pattern
    // as user input using cin and store it in a variable.
    int triangleNum;
    cout << "Enter some random number of rows of the "
            "triangle Number pattern = "
         << endl;
    cin >> triangleNum;
    // Loop from 1 to the number of rows using For loop.
    for (int m = 1; m <= triangleNum;
         m++) { // Loop from 1 to first loop iterator value
                // using another Nested For loop.
        for (int n = 1; n <= m; n++) {
            // Print the star character with space in the
            // inner For loop.
            cout << m << " ";
        }
        // Print the iterator value of the parent loop with
        // space in the inner For loop.
        /*(This prints the same number parent loop number of
        times*/
        cout << endl;
    }

    return 0;
}

Output:

Enter some random number of rows of the triangle Number pattern = 
5
1 
2 2 
3 3 3 
4 4 4 4 
5 5 5 5 5

3) C Implementation

  • Give the number of rows of the right-angled triangle Number pattern as user input using scanf and store it in a variable.

Below is the implementation:

#include <stdio.h>

int main()
{

    // Give the number of rows of the right-angled triangle
    // Number pattern
    // as user input using scanf and store it in a variable.
    int trianglerows;
    scanf("%d", &trianglerows);
    // Loop from 1 to the number of rows using For loop.
    for (int m = 1; m <= trianglerows;
         m++) { // Loop from 1 to first loop iterator value
                // using another Nested For loop.
        for (int n = 1; n <= m; n++) {
            // Print the iterator value of the parent loop
            // with space in the inner For loop.
            //(This prints the same number parent loop
            // number of times)
            printf("%d ", m);
        }
        // Print the newline character after ending of inner
        // For loop.
        printf("\n");
    }
    return 0;
}

Output:

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

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