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Discover Ruby Programming Through Fun Examples

Print Out a Triangle

Explore how to print characters in a triangle shape using Ruby by applying loops, variables, and control flow. This lesson helps you understand pattern analysis and reinforces foundational programming concepts by writing a clear, visually structured program.

We'll cover the following...

Printing out characters in shapes is often used as beginner programming exercise, because they are easy to understand and visually interesting programs.

Problem

Write a program to print out hashes in a triangle shape, as shown below:

#
##
###
####
#####
######
#######
########
Drawn shape of a triangle

Purpose

  • Develop the ability to analyze patterns

  • Learn about variables

  • Learn about looping

Analyze

Row

Number of hashes

1

1

2

2

3

3

...

...

n

n

Hints

Print out text

  • We can display text using the puts command: However, if we would like to ...