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