Ruby - Basic

To prompt output in colsole of Ruby, use:

>>> puts 'hello world!'    // single or double quotes is same

>> hello world

String aritmathics:

>>> puts 'one '+'day'

>> one day

>>> puts 'lol '*5

>> lol lol lol lol lol

To convert from number to string, use:

>>> id = 45

>>> puts id.to_s + ' indonesia raya'

>> 45 indonesia raya

To convert from string to number, use:

>>> code = '45'

>>> puts code.to_i + 5

>> 50

To convert from string to float, use:

>>> code = '45.3'

>>> puts code.to_f + 0.7

>> 46.0

Get input from keyboard:

>>> puts gets

>> holla for you all

>>> holla for you all

Binding keyboard input to variable:

>>> name = gets

>> sergey brin

>>> puts 'Your name is: '+ name +' and it's okey'

>> Your name is: sergey brin

>>  and it's okey

Removing CR-LF from gets

>>> name = gets.chomp

>> sergey brin

>>> puts 'Your name is: '+name+' and it's okey'

>> Your name is: sergey brin and it's okey

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Ruby - Basic