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How to use the 'and' keyword in Ruby?
'and' Keyword in Ruby
In Ruby, we use the "and" keyword to return True if both the operands are true, and False if one or more of the operands is false. It should be noted that the and keyword is equivalent to the && logical operator, but it has lower precedence in Ruby.
Syntax
The syntax of the and keyword is shown below.
expression1 and expression2
Let's use the and keyword in a Ruby code and see how it works.
Example
Consider the code shown below.
variable1 = "sunshine" variable2 = "$un$h1ne" # Using and keyword if (variable1 == "sunshine" and variable2 == "$un$h1ne") puts "Learn Ruby Programming" else puts "Variables Don't Match!" end
Output
It will produce the following output.
Learn Ruby Programming
'and' and '&&' (logical and) Operator in Ruby
Now, let's use the and keyword with the logical and (&&) operator to see how it is different and in what scenarios we should choose one over the other. Consider the code shown below.
Example
Consider the code shown below.
# and && operator def first() true; end def second() true; end # Using && operator res1 = first && second ? "TutorialsPoint" : "Do Nothing" puts res1 # Using and keyword res2 = first and second ? "TutorialsPoint" : "Do Nothing" puts res2
Output
If we write the following code on any Ruby IDE, then we will get the following output in the terminal.
TutorialsPoint true
In the above code, when we use the and keyword, the output we got is "true", and that is because of the order of precedence of the "=" and the "and" keyword.
On the other hand, when we used the "&&" operator, we got "TutorialsPoint" as the output. This is because the precedence of the "logical and" operator (&&) is greater than the "and" keyword and also greater than the "=" operator.