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Given the number of rows, the task is to Print Equilateral triangle Pattern of Star in C, C++, and Python
Examples:
Example1:
Input:
Given number of rows = 8
Output:
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Example2:
Input:
Given number of rows = 10 Given Character to print ='$'
Output
$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $
Program to Print the Equilateral triangle Pattern of Star in C, C++, and Python
Below are the ways to Print the Equilateral triangle Pattern of Star in C, C++, and Python.
Method #1: Using For Loop (Star Character)
Approach:
- Give the number of rows as static input and store it in a variable.
- Take a variable to say g and initialize its value with (2*number of rows)-2.
- Loop from 0 to the number of rows using For loop.
- Loop from 0 to g using another For Loop(Inner For loop).
- Print the space character in the inner For Loop.
- Decrement the value of g by 1 after the end of the inner For loop.
- Loop from 0 to m+1 using another For loop(Nested For loop) where m is the iterator value of the parent For loop.
- Print the star character with space.
- Print the Newline character after the end of the Two inner For loops.
- The Exit of the Program.
1) Python Implementation
Below is the implementation:
# Give the number of rows as static input and store it in a variable. numberOfRows = 8 # Take a variable to say g and initialize its value with (2*number of rows)-2. g = (2*numberOfRows)-2 # Loop from 0 to the number of rows using For loop. for m in range(0, numberOfRows): # Loop from 0 to g using another For Loop(Inner For loop). for n in range(0, g): # Print the space character in the inner For Loop. print(end=" ") # Decrement the value of g by 1 after the end of the inner For loop. g = g-1 # Loop from 0 to m+1 using another For loop(Nested For loop) # where m is the iterator value of the parent For loop. for n in range(0, m+1): # Print the star character with space. print('*', end=" ") # Print the Newline character after the end of the Two inner For loops. print()
Output:
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
2) C++ Implementation
Below is the implementation:
#include <iostream> using namespace std; int main() { // Give the number of rows as static input and store it // in a variable. int numberOfRows = 8; // Take a variable to say g and initialize its value // with (2*number of rows)-2. int g = (2 * numberOfRows) - 2; // Loop from 0 to the number of rows using For loop. for (int m = 0; m < numberOfRows; m++) { // Loop from 0 to g using another For Loop(Inner For // loop). for (int n = 0; n < g; n++) { // Print the space character in the inner For // Loop. cout << " "; } // Decrement the value of g by 1 after the end of // the inner For loop. g = g - 1; // Loop from 0 to m+1 using another For loop(Nested // For loop) where m is the iterator value of the // parent For loop. for (int n = 0; n < m + 1; n++) { // Print the star character with space. cout << "* "; } // Print the Newline character after the end of the // Two inner For loops. cout << endl; } return 0; }
Output:
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
3) C Implementation
Below is the implementation:
#include <stdio.h> int main() { // Give the number of rows as static input and store it // in a variable. int numberOfRows = 13; // Take a variable to say g and initialize its value // with (2*number of rows)-2. int g = (2 * numberOfRows) - 2; // Loop from 0 to the number of rows using For loop. for (int m = 0; m < numberOfRows; m++) { // Loop from 0 to g using another For Loop(Inner For // loop). for (int n = 0; n < g; n++) { // Print the space character in the inner For // Loop. printf(" "); } // Decrement the value of g by 1 after the end of // the inner For loop. g = g - 1; // Loop from 0 to m+1 using another For loop(Nested // For loop) where m is the iterator value of the // parent For loop. for (int n = 0; n < m + 1; n++) { // Print the star character with space. printf("* "); } // Print the Newline character after the end of the // Two inner For loops. printf("\n"); } return 0; }
Output:
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Method #2: Using For Loop (User Input)
Approach:
- Give the number of rows as static input and store it in a variable.
- Scan the character to print as user input and store it in a variable.
- Take a variable to say g and initialize its value with (2*number of rows)-2.
- Loop from 0 to the number of rows using For loop.
- Loop from 0 to g using another For Loop(Inner For loop).
- Print the space character in the inner For Loop.
- Decrement the value of g by 1 after the end of the inner For loop.
- Loop from 0 to m+1 using another For loop(Nested For loop) where m is the iterator value of the parent For loop.
- Print the star character with space.
- Print the Newline character after the end of the Two inner For loops.
- The Exit of the Program.
1) Python Implementation
- Give the number of rows as user input using int(input()) and store it in a variable.
- Give the Character as user input using input() and store it in another variable.
Below is the implementation:
# Give the number of rows as user input using int(input()) and store it in a variable. numberOfRows = int(input('Enter some random number of rows = ')) # Give the character to print as user input using int(input()) and store it in another variable. characte = input('Enter some random character to print = ') # Take a variable to say g and initialize its value with (2*number of rows)-2. g = (2*numberOfRows)-2 # Loop from 0 to the number of rows using For loop. for m in range(0, numberOfRows): # Loop from 0 to g using another For Loop(Inner For loop). for n in range(0, g): # Print the space character in the inner For Loop. print(end=" ") # Decrement the value of g by 1 after the end of the inner For loop. g = g-1 # Loop from 0 to m+1 using another For loop(Nested For loop) # where m is the iterator value of the parent For loop. for n in range(0, m+1): # Print the given character with space. print(characte, end=" ") # Print the Newline character after the end of the Two inner For loops. print()
Output
Enter some random number of rows = 10 Enter some random character to print = $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $
2) C++ Implementation
- Give the number of rows as user input using cin and store it in a variable.
- Give the Character as user input using cin and store it in another variable.
Below is the implementation:
#include <iostream> using namespace std; int main() { // Give the number of rows as user input using // cin and store it in a variable. int numberOfRows; cin >> numberOfRows; // Create a character variable. char characte; // Give the character as user input using cin and store // it in another variable. cout << "Enter some random character to print = " << endl; cin >> characte; cout << endl; int g = (2 * numberOfRows) - 2; // Loop from 0 to the number of rows using For loop. for (int m = 0; m < numberOfRows; m++) { // Loop from 0 to g using another For Loop(Inner For // loop). for (int n = 0; n < g; n++) { // Print the space character in the inner For // Loop. cout << " "; } // Decrement the value of g by 1 after the end of // the inner For loop. g = g - 1; // Loop from 0 to m+1 using another For loop(Nested // For loop) where m is the iterator value of the // parent For loop. for (int n = 0; n < m + 1; n++) { // Print the given character with space. cout << characte << " "; } // Print the Newline character after the end of the // Two inner For loops. cout << endl; } return 0; }
Output
10 Enter some random character to print = $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $
3) C Implementation
- Give the number of rows as user input using scanf and store it in a variable.
- Give the Character as user input using scanf and store it in another variable.
Below is the implementation:
#include <stdio.h> int main() { // Give the number of rows as user input using scanf and // store it in a variable. int numberOfRows; scanf("%d", &numberOfRows); // Create a character variable. // Give the character as user input using scanf and // store it in another variable. char characte; scanf("%c", &characte); printf("\n"); // Take a variable to say g and initialize its value // with (2*number of rows)-2. int g = (2 * numberOfRows) - 2; // Loop from 0 to the number of rows using For loop. for (int m = 0; m < numberOfRows; m++) { // Loop from 0 to g using another For Loop(Inner For // loop). for (int n = 0; n < g; n++) { // Print the space character in the inner For // Loop. printf(" "); } // Decrement the value of g by 1 after the end of // the inner For loop. g = g - 1; // Loop from 0 to m+1 using another For loop(Nested // For loop) where m is the iterator value of the // parent For loop. for (int n = 0; n < m + 1; n++) { // Print the given character with space. printf("%c ",characte); } // Print the Newline character after the end of the // Two inner For loops. printf("\n"); } return 0; }
Output
10$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $
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