Python Code Example: floyd’s triangle

This Python code generates Floyd’s Triangle based on user input. Floyd’s Triangle is a right-angled triangular array of natural numbers.

Code Example

n = int(input("Enter number of rows of floyd`s trangle: "))
k = 1

for i in range(1, n + 1):
    for j in range(1, i + 1):
        print(k, end=" ")
        k = k + 1
    print()

Output

Enter number of rows of floyd`s trangle: 10
1 
2 3 
4 5 6 
7 8 9 10 
11 12 13 14 15 
16 17 18 19 20 21 
22 23 24 25 26 27 28 
29 30 31 32 33 34 35 36 
37 38 39 40 41 42 43 44 45 
46 47 48 49 50 51 52 53 54 55 

Code Explanation

Input the Number of Rows

n = int(input("Enter number of rows of Floyd's triangle: "))

• The code prompts the user to input the number of rows for Floyd’s Triangle.
• The input is converted to an integer and stored in the variable n.

Initializing the First Number

k = 1

• The variable k is initialized to 1. This variable keeps track of the current number to be printed in the triangle.

Generating Floyd’s Triangle

for i in range(1, n + 1):
    for j in range(1, i + 1):
        print(k, end=" ")
        k = k + 1
    print()

• Outer Loop:for i in range(1, n + 1)
  • This loop runs from 1 to n inclusive. Each iteration represents a row in Floyd’s Triangle.

Inner Loop

for j in range(1, i + 1):
    print(k, end=" ")
    k = k + 1

• Inner Loop:for j in range(1, i + 1)
  • This loop runs from 1 to i inclusive, determining the number of elements in the current row.
• Printing the Number:print(k, end=" ")
  • This line prints the current value of k followed by a space. The end=" " parameter ensures that the numbers are printed on the same line separated by spaces.
• Incrementing k:k = k + 1
  • After printing the current value of k, k is incremented by 1 to prepare for the next number to be printed.

Moving to the Next Line

print()

• After the inner loop completes, print() is called to move to the next line. This ensures that each row of Floyd’s Triangle starts on a new line.

Example

If the user inputs 5 for n, the output will be:

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15