Ruby - Control Flow Statement !

if Statement in Ruby

if, elsif and else block in Ruby controls decision based on the condition to true/false resulting in the different execution of the code.

key = 10
if key > 15
  puts 'Key is greater than 15'
elsif key < 8
  puts 'key is less than 8'
else
  puts 'key is between 8 and 15'
end 

unless statement is inverse of if statement. unless statement is executed if expression is not true

num = 10
unless num == 9
  puts "Selected number is not 10"
end

Ternary Operator

Ternary operator is short hand for if else expression. Two symbols ? : are used.

x = 2
x > 5 ? 'Greater' : 'Smaller'