Convert to Integer « Number « Ruby

1.convert a floating-point number
2.convert a string
3.convert a binary number from a string
4.convert an octal number
5.convert a hexadecimal number
6.convert a character code
7.Converting Between Classes
8.ArgumentError: invalid value for Integer: "1001 nights"
9.Converting Between Characters and Values

10.Parsing A Number From A String
11.to_i gives the integer version of an object, and to_f gives the float version
12.Convert string to integer by parameter
13.Convert string to number with non number string
14.Number parser by regular expressons