Ruby Programming/Reference/Objects/Numeric/Integer

Integer provides common behavior of integers (Fixnum and Bignum). Integer is an abstract class, so you should not instantiate this class. Inherited Class: Numeric Included Module: Precision Class Methods: Integer::induced_from(numeric) Returns the result of converting numeric into an integer. Instance Methods: Bitwise operations: AND, OR, XOR, and inversion. ~i i & int i | int i ^ int i << int i >> int Bitwise left shift and right shift. i[n] Returns the value of the nth bit from the least significant bit, which is i[0]. 5[0] # => 1 5[1] # => 0 5[2] # => 1 i.chr Returns a string containing the character for the character code i. 65.chr # => "A" ?a.chr # => "a" i.downto( min) {| i| ...} Invokes the block, decrementing each time from i to min. 3.downto(1) {|i| puts i } # prints: # 3 # 2 # 1 i.next i.succ Returns the next integer following i. Equivalent to i + 1. i.size Returns the number of bytes in the machine representation of i. i.step( upto, step) {| i| ...} Iterates the block from i to upto, incrementing by step each time. 10.step(5, -2) {|i| puts i } # prints: # 10 # 8 # 6 i.succ See i.next i.times {| i| ...} Iterates the block i times. 3.times {|i| puts i } # prints: # 0 # 1 # 2 i.to_f Converts i into a floating point number. Float conversion may lose precision information. 1234567891234567.to_f # => 1.234567891e+15 i.to_int Returns i itself. Every object that has to_int method is treated as if it's an integer. i.upto( max) {| i| ...} Invokes the block, incrementing each time from i to max. 1.upto(3) {|i| puts i } # prints: # 1 # 2 # 3