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# ====================================================================================
# Conditionals
# ====================================================================================
#
# Here is how you create conditionals in Ruby. Take the text
# in this file and paste it into repl.rb and save:
repl do
puts "* RUBY PRIMER: Conditionals"
end
# ====================================================================================
# if
# ====================================================================================
repl do
puts "** INFO: if statement"
i_am_one = 1
if i_am_one
puts "This was printed because i_am_one is truthy."
end
end
# ====================================================================================
# if/else
# ====================================================================================
repl do
puts "** INFO: if/else statement"
i_am_false = false
if i_am_false
puts "This will NOT get printed because i_am_false is false."
else
puts "This was printed because i_am_false is false."
end
end
# ====================================================================================
# if/elsif/else
# ====================================================================================
repl do
puts "** INFO: if/elsif/else statement"
i_am_false = false
i_am_true = true
if i_am_false
puts "This will NOT get printed because i_am_false is false."
elsif i_am_true
puts "This was printed because i_am_true is true."
else
puts "This will NOT get printed i_am_true was true."
end
end
# ====================================================================================
# case
# ====================================================================================
repl do
puts "** INFO case statement"
i_am_one = 1 # change this value to see different results
case i_am_one
when 10
puts "the value of i_am_one is 10"
when 9
puts "the value of i_am_one is 9"
when 5
puts "the value of i_am_one is 5"
when 1
puts "the value of i_am_one is 1"
else
puts "Value wasn't cased."
end
end
# ====================================================================================
# comparison operators
# ====================================================================================
repl do
puts "** INFO: Different types of comparisons"
if 4 == 4
puts "4 equals 4 (==)"
end
if 4 != 3
puts "4 does not equal 3 (!=)"
end
if 3 < 4
puts "3 is less than 4 (<)"
end
if 4 > 3
puts "4 is greater than 3 (>)"
end
end
# ====================================================================================
# and/or conditionals
# ====================================================================================
repl do
puts "** INFO: AND, OR operator (&&, ||)"
if (4 > 3) || (3 < 4) || false
puts "print this if 4 is greater than 3 OR 3 is less than 4 OR false is true (||)"
end
if (4 > 3) && (3 < 4)
puts "print this if 4 is greater than 3 AND 3 is less than 4 (&&)"
end
end
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