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Answer to Question #220963 in Python for Hari nadh babu

Solid Right Angled Triangle - 2

This Program name is Solid Right Angled Triangle - 2. Write a Python program to Solid Right Angled Triangle - 2, it has two test cases

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5 ways in python to print inverted right-angled triangle.

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Introduction :

In this tutorial, we will learn how to print an inverted right-angled triangle with numbers or characters in Python . A right-angled triangle has one 90 degrees angle or right angle . For an inverted right-angled triangle , this right angle will be at the top left corner. The other angles will be 45 degrees each.

The program will print the right-angled triangle using numbers or any other character. It will ask the user to enter the height and the character to print the triangle and print it with the user-given values.

Example 1: Python 3 program to print inverted right-angled triangle using number:

The following program takes the height of the triangle as input from the user and prints the triangle with numbers:

Get it on GitHub

How does it work?

In this example, we are printing an inverted right-angled triangle using only numbers. The numbers are printed serially in increasing order like 1,2,3,4,5… .

If the height of the triangle is 5 :

• For the first line, we are printing 5 numbers ‘1,2,3,4,5’
• For the second line, we are printing 4 numbers ‘1,2,3,4’
• For the third line, three numbers ‘1,2,3’ etc.

We need to use two loops, one outer loop, and one inner loop to print the pattern. The outer loop will point to each row of the triangle and the inner loop will print the numbers.

• First of all, the program is reading the height of the triangle as input from the user. It can print a triangle of any height.
• It runs one for loop for height number of times. It runs from i = 1 to i = height .
• For each iteration of the outer loop, it runs one more inner loop to print the numbers of the triangle .
• e.g. if the height is 5 , for the first time, it will run in the range of j = 1 to j = 5 – 1 + 2 = 6 i.e. it will run for j = 1, 2, 3, 4, 5 .
• For the second time, it will run from j = 1 to j = 4 or 4 times, etc.
• The inner loop prints out the numbers serially.

Example 2: Python 3 program to print an inverted right-angled triangle using any character :

We can also print the same inverted triangle using any character. The following program shows how to print the pattern with a user-given character:

You can use any character to print the pattern:

This is similar to the previous example.

• It uses two for loops to print the pattern.
• The outer loop runs for height number of times. It will run for i = 0 to i = height - 1 . This step is different than the previous example. You can also start the loop from i = 1 .
• The inner loop runs from j = 0 to j = height - i . Inside this loop, it prints the character.
• Unlike the previous example, we are printing a character to create the triangle. The character is also provided by the user. In the example, we are using * to print the triangle, but you can also use any character e.g. ‘$’,’&’,’#’ etc.

Example 3: How to use while loops to print the inverted right-angled triangle:

You can use while loops to print the same pattern:

This is similar to the previous example. The difference is that you need to initialize the variables i and j before the loop starts and the value of i and j should be incremented at the end of each iteration of the loops.

It will print similar results.

Example 4: How to print a triangle with incremental numbers:

The following example shows how to print an inverted right-angled triangle with incremented numbers, e.g.:

We can use the same approach with a small change to the print statement:

• It uses a new variable count to print the pattern. The value of this variable is incremented by 1 at the end of each iteration of the loop.
• The print statement formats the value with 4 spaces and is left justified. Without this change, the numbers won’t be aligned vertically.

Sample output:

Example 5: How to print the triangle with numbers in reverse order:

We need to run the inner for loop in reverse to print the triangle with reverse ordered numbers. For example,

The range(height - i, 0, -1) statement will run the loop from j = height - i to j = 1 , and on each step it decrements the value of j by 1 .

If you run this program, it will print the output as below:

Conclusion:

In this tutorial, we have learned how to print one inverted right-angled triangle in Python using numbers or any other characters. This tutorial is a good example of using nested for loops in Python. You can modify the program to print one non-inverted right-angle triangle . You can also try to print any other shapes using the same approach.

If you want to contribute in any other way to this post, please raise a pull request on GitHub.

Similar tutorials:

• Python program to print a triangle using star
• Python program to print a right angled triangle
• Python program to find out the perimeter of a triangle
• Python program to find the area and perimeter of a triangle
• Python program to print a star hollow square pattern
• Python program to print list elements in different ways

Updated on 28 May 2023

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Right triangle in Python

Problem statement:.

In this problem of the Right triangle in Python, we need to print a right-angled triangle pattern. Triangle should make 90* at the top and left side of the user means when we are looking at the triangle.

Code for Right triangle in Python:

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Python Program for Printing Inverted Right Triangle Number Pattern

June 5, 2020

Print Inverted Right Triangle Number Pattern

In this Python Program, we will be discussing about how to write a program to print Inverted Right Triangle Number Pattern. In this pattern, there are n numbers of rows are present which is entered by user. We will use ‘count’ variable for printing number decreasing order. First increase the count variable to the max value.Then, With every iteration of for loop, we will decrease the count variable by 1. So, User have to enter a single value, that will be determine as a number of rows and columns of the pattern. With the help of “for loop”, we will print the Inverted Right Triangle Number Pattern.

Step 1. Start

Step 2. Take number of rows as input from the user and stored it into num.

Step 3. Take a variable ‘count’ and initialize it as 0.

Step 4. Run a Reverse for loop starting from num to 0 value.

Step 5. Inside above for loop, increase count variable by i.

Step 6. Run a loop ‘i’ number of times to iterate through all the rows which is Starting from i=0 to num.

Step 7. Run a nested loop inside the main loop for printing spaces which is starting from j=0 to num-i.

Step 8. Print ‘count’ inside the nested loop for each row.

Step 9.Inside above Nested for loop, Decrease count variable by i.

Stop 10. Move to the next line by printing a new line using print() function.

Step 11. Stop

Python Program:

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2 comments on “Python Program for Printing Inverted Right Triangle Number Pattern”

k=10 num=5 for i in range(num,0,-1): for j in range(i-1,0,-1): print(k,end=””) k=k-1 print()

n=int(input()) x=10 for i in range(n,-1,-1): for j in range(i): print(x,end=””) x=x-1 print()

How to generate an inverted right-angled triangle in Python

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In this shot, we will discuss how to generate an inverted right-angled triangle using numbers in Python.

We can print a plethora of patterns using Python. The only prerequisite to do this is a good understanding of how loops work in Python.

Here, we will be using simple for loops to generate an inverted right-angled triangle using numbers.

Description

A triangle is said to be right-angled if it has an angle equal to 90 degrees on its left side. An inverted right-angled triangle is just the inverted form of this with its vertex lying on the bottom.

To execute this using Python programming, we will be using two for loops:

• An outer loop : To handle the number of rows.
• An inner loop : To handle the number of columns.

Let’s look at the below code snippet.

Explanation

In line 2, the input for the number of rows (i.e., length of the triangle) is taken.

In line 5, we create a for loop to handle the number of rows. The loop is a reversed one, i.e., it starts with the input value, and with increasing rows, the number of characters to be printed decreases.

In line 8, we create a nested for loop (inner loop), to handle the number of columns. This follows the same principle as above, which help together to create an inverted triangle.

In line 11, we have printed j+1 , which results in iteration from 1 (since j + 1) to a length of (row-i) in each row. As i keeps increasing after every iteration, the number of integers keeps decreasing.

In line 12, we use print() , to move to the next line.

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