How to generate a left-angled triangle using numbers in Python
Introduction
In this shot, we will discuss how to use numbers to generate a left-angled triangle in Python. We can print a plethora of patterns with Python. The basic and only prerequisite is a good understanding of how loops work in Python.
Here, we will use a simple for loops to generate a left-angled triangle with numbers.
Description
A triangle is left-angled if and only if it has one angle equal to 90 degrees on its left side.
Code
We will use 2 for loops nested within an outer for loop:
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An outer loop: To handle the number of rows.
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Two inner loops: One to handle the initial spaces and the other to print the integers.
# Number of rowsrows = 5# Iterating value for columnk = 2 * rows - 2# Loop through rowsfor i in range(rows):# Loop to print initial spacesfor j in range(k):print(end = " ")# Updating value of Kk = k - 2# Loop to print the numbersfor j in range(i + 1):print(j + 1, end = " ")print()
Explanation
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In line 2, we take the input for the number of rows (i.e. the length of the triangle).
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In line 5, we create the iterating variable
k, which will be used later to handle the number of columns. -
From lines 8 to 20, we create the outer
forloop to iterate through the number of rows. -
In lines 11 and 12, we create the first inner nested loop to print the initial spaces.
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In line 15, the value of
kis updated so that the output is a left-angled triangle, i.e., the characters are printed from right to left. -
In line 19, we print
j+1, which results in an iteration from 1 (since j + 1) to the length ofiin each row. Asikeeps increasing with increasing rows, the numbers keep increasing as the line number increases. -
In line 20, we use
print()outside the inner loops and inside the outer loop to move to the next line.
In this way, we can use numbers to generate a left-angled triangle in Python.
