Integer

Front 1

#to_i

Back 1

to_i → integer

As int is already an Integer, all these methods simply return the receiver.

Synonyms: to_int, floor, ceil, truncate.

Front 2

#chr

Back 2

chr([encoding]) → string

Returns a string containing the character represented by the int‘s value according to encoding.

Example

65.chr #=> "A"

230.chr #=> "\346"

255.chr(Encoding::UTF_8) #=> "\303\277"

Front 3

#downto

Back 3

downto(limit) {|i| block } → self

downto(limit) → an_enumerator

Iterates the given block, passing decreasing values from int down to and including limit.

If no block is given, an Enumerator is returned instead.

Example

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

print " Liftoff!\n"

#=> "5.. 4.. 3.. 2.. 1.. Liftoff!"

Front 4

#even?

Back 4

even? → true or false

Returns true if int is an even number.

Example

5.even? #=> false

2.even? #=> true