class Integer < Numeric

Subclasses: Bignum, Fixnum

Integer is the basis for the two concrete classes that hold whole numbers, Bignum and Fixnum.

instance methods

chr

int.chr → aString

Returns a string containing the ASCII character represented by the receiver's value.

65.chr → "A" ?a.chr → "a" 230.chr → "\346"

downto

int.downto( anInteger ) {| i | block } → int

Iterates block, passing decreasing values from int down to and including anInteger.

5.downto(1) { |n| print n, ".. " } print " Liftoff!\n"

produces:

5.. 4.. 3.. 2.. 1.. Liftoff!

integer?

int.integer? → true

Always returns true.

next

int.next → anInteger

Returns the Integer equal to int + 1.

1.next → 2 (-1).next → 0

step

int.step( endNum, step ) {| i | block } → int

Invokes block with the sequence of numbers starting at int, incremented by step on each call. The loop finishes when the value to be passed to the block is greater than endNum (if step is positive) or less than endNum (if step is negative).

1.step(10, 2) { |i| print i, " " }

produces:

1 3 5 7 9

succ

int.succ → anInteger

Synonym for Integer#next.

times

int.times {| i | block } → int

Iterates block int times, passing in values from zero to int - 1.

5.times do |i| print i, " " end print "\n"

produces:

0 1 2 3 4

upto

int.upto( anInteger ) {| i | block } → int

Iterates block, passing in integer values from int up to and including anInteger.

5.upto(10) { |i| print i, " " }

produces:

5 6 7 8 9 10