Integers, Floats, Strings Cheat Sheet
Name  Description  Syntax  Examples 

Integer literal  A whole number  3 552 

Float literal  A decimal number  42.23 0.133742 

Addition Subtraction Multiplication 
Basic math  a + b a  b a * b 
5.2 + 6.34 # => 11.54 2.59  4.89 # => 2.3 5 * 3.7 # => 18.5 
Division  Mind the difference between integer and float division!  a / b  # integer division: 6 / 4 # => 1 # float division: 6 / 4.0 # => 1.5 
Modulo  Return the remainder of a division  a % b  13 % 6 # => 1 
String literal  A string of characters, text  "this is a string" 

String interpolation  Text with Ruby code embedded within  "another string with #{interpolation}!" 