How to permanently reverse a string in Ruby

Overview

In Ruby, we use the reverse! method to permanently reverse a string.

Note: The reverse! method is different from the reverse method. reverse does not permanently modify a string, but reverse! does.

When we call the reverse! method on a string, the original string is modified and reversed. This means the characters in the string are reversed.

Syntax

str.reverse!

Parameters

  • str: The string we want to permanently reverse.

Return value

This method returns a new string that is the reverse of the original.

Example

# create strings
str1 = "this"
str2 = "is"
str3 = "not"
str4 = "reversed"
# reverse strings
# permanently
str1.reverse!
str2.reverse!
str3.reverse!
str4.reverse!
# print strings
puts str1
puts str2
puts str3
puts str4

Explanation

  • Lines 2 to 5: We create some strings.

  • Line 9 to 12: We call the reverse method on the strings to permanently reverse the strings.

  • Line 15 to 18: We print the permanently reversed strings to the console.

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