In Ruby, a boolean is a value that can either be true or false. It is often used to evaluate conditions in programs. Here are some examples of how to use boolean in Ruby:
1. Checking for equality: You can use the double equals == operator to compare two values and return a boolean result. For example:
x = 5
y = 10
puts x == y # prints false
2. Comparing values: You can use comparison operators such as <, >, <=, >= to compare two values and return a boolean result. For example:
x = 5
y = 10
puts x < y # prints true
3. Using logical operators: You can use logical operators such as && (and), || (or), and ! (not) to combine boolean expressions and return a boolean result. For example:
x = 5
y = 10
z = 15
puts x < y && y < z # prints true
4. Testing for truthiness: In Ruby, all objects can be evaluated as true or false, except for nil and false themselves. For example:
x = 5
puts x # prints true
y = nil
puts y # prints false
These are just a few examples of how to use boolean in Ruby. Booleans are a fundamental concept in programming and are used in many different ways in many different programming languages.