The **`num.odd?` function** in Ruby returns `true` if the integer is `odd`; otherwise, it returns `false`. 

Figure 1 shows the visual representation of the `num.odd?` function.

# Syntax
```ruby
num.odd?
# where num is the integer which is to be checked for odd 
```
# Parameter
This function does not require a parameter.

# Return value
This function returns `true` if the integer is `odd`; otherwise, it returns `false`.

# Example

#odd number
print "(3).odd? : ",(3).odd? , "\n"

#even number
print "(4).odd? : ", (4).odd?, "\n"



What is num.odd? in Ruby?

The num.odd? function in Ruby checks if an integer is odd, returning true or false.