Check out example codes for "if else ruby". It will help you in understanding the concepts better.

Code Example 1

x = 1
if x > 2
   puts "x is greater than 2"
elsif x <= 2 and x!=0
   puts "x is 1"
else
   puts "I can't guess the number"
end

Code Example 2

if condition
	expression

Code Example 3

if condition
  expression
else
  expression

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