The following code to double a number is not working as expected. E.g., if input is 5, it is returning 55 instead of 10.
# program to double a number taken from user input using user defined method
def double (x)
puts("Lets yield!")
yield x * 2
end
puts "Enter number you want to double : "
x = gets.chomp
double (x) { |n| puts n }
Because you are using the * method on a string. Convert x to an integer.
x = gets.chomp.to_i
gets.chomp you always have a stringputs x.class after that line
chomp then? A number cannot contain a newline, can it?
123 is an Integer; "456" is a String. gets will always interpret the input as a String.According to this previous question, We take input using gets but it causes a problem of taking \n as a part of the input at the end of the string for example:
x=gets #Enter amr as input then it will print 4, three chars + \n
print x.length
here came gets.chomp which gets rid of \n in the end, So both gets and gets.chomp take the input as a string so you need to convert it as @Ursus mentioned before by using gets.chomp.to_i
