Ruby If-else Statement

The Ruby if else statement is used to test condition. There are various types of if statement in Ruby.

• if statement
• if-else statement
• if-else-if (elsif) statement
• ternay (shortened if statement) statement

---

Ruby if statement

Ruby if statement tests the condition. The if block statement is executed if condition is true.

Syntax:

if (condition)  

//code to be executed  

end

Example:

a = gets.chomp.to_i   

if a >= 18   

  puts "You are eligible to vote."   

end

Output:

---

Ruby if else

Ruby if else statement tests the condition. The if block statement is executed if condition is true otherwise else block statement is executed.

Syntax:

if(condition)  

    //code if condition is true  

else  

//code if condition is false  

end

Example:

a = gets.chomp.to_i   

if a >= 18   

  puts "You are eligible to vote."   

else   

  puts "You are not eligible to vote."   

end

Output:

---

Ruby if else if (elsif)

Ruby if else if statement tests the condition. The if block statement is executed if condition is true otherwise else block statement is executed.

Syntax:

if(condition1)  

//code to be executed if condition1is true  

elsif (condition2)  

//code to be executed if condition2 is true  

else (condition3)  

//code to be executed if condition3 is true  

end

Example:

a = gets.chomp.to_i   

if a <50   

  puts "Student is fail"   

elsif a >= 50 && a <= 60   

  puts "Student gets D grade"   

elsif a >= 70 && a <= 80   

  puts "Student gets B grade"   

elsif a >= 80 && a <= 90   

  puts "Student gets A grade"    

elsif a >= 90 && a <= 100   

  puts "Student gets A+ grade"    

end

Output:

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Ruby ternary Statement

In Ruby ternary statement, the if statement is shortened. First it evaluats an expression for true or false value then execute one of the statements.

Syntax:

test-expression ? if-true-expression : if-false-expression  

Example:

var = gets.chomp.to_i;   

a = (var > 3 ? true : false);    

puts a

Output: