Control Structures in Ruby
practice.

The elsif statement can add many alternatives to if/else statements.

What is the output of the given code?

counter=6
   if counter<=5
   puts (counter)
   counter=counter+1
   puts (counter)
   elsif counter>5
   puts (counter)
   counter=2*counter
   puts(counter)
   else 
   puts(counter)
   counter=counter-1
   puts(counter)
   end

What is output of the given code?

counter=-3
   if counter<=5
   puts (counter)
   counter=counter+1
   puts (counter)
   elsif counter>5
   puts (counter)
   counter=2*counter
   puts(counter)
   end

What is the output of the given code?

 if !true
   print "False"
   elsif !true || true
   print "True"
   end

What is the output of the given code?

variable = false
   if variable
   print "false"
   elsif !variable
   print "true" 
   end

What is the output of the given code?

x=7
   y=9
   if x==y
   print "equal"
   elsif x>y
   print "greater" 
   else
   print "less"
   end

What is the output of the given code?

a=true
   b=false
   if a && b
   puts "False"
   elsif a || b
   puts "True"
   else
   puts "neither true nor false"
   end

What is the output of the given code?

a=10
    b=2
    if a>b
    a=a*b
    puts (a)
    elsif a<b
    a=a*a+b
    puts (a)
    else
    a=a-b
    puts (a)
    end

Syntax for unless conditional statement is

unless conditional [then]
   code
else
   code 
end

What is the output of the given code?

x=3
unless x>2
puts "x is less than 2"
else
puts "x is greater than 2"
end

What is the output of the given code?

var =  1
print "1 -- Value is set\n" if var
print "2 -- Value is set\n" unless var
var = false
print "3 -- Value is set\n" unless var

What is the output of the given code?

hungry=false
unless hungry
 print "Not hungry"
else
 print "Hungry"
end

The following syntax is also used for unless conditional statement.

code unless conditional

What is the output of the given code?

counter=12
unless counter
 print counter+1
else
 print counter+2
end

What is the output of the given code?

unless true && false
print "false"
else 
    print "ruby"
end

What is the output of the given code?

print "2 is less than 3" unless 2>3

What is the output of the given code?

x=8
y=10
unless x>y
puts "x is less than y"
end
unless x>y+1
puts "x is less than y+1"
end

What is the output of the given code?

x="ruby".length
y="language".length
puts x,y
unless x>y 
print "length of x is less than that of y"
end

What is the output of the given code?

x=8
y=10
unless x<y
puts "x is less than y"
end
unless x>y+1
puts "x is less than y+1"
end

What is the output of the given code?

age =  5
case age
when 0 .. 2
    puts "baby"
when 3 .. 6
    puts "little child"
when 7 .. 12
    puts "child"
when 13 .. 18
    puts "youth"
else
    puts "adult"
end