# Ruby Programming/Reference/Objects/Numeric

Numeric provides common behavior of numbers. Numeric is an abstract class, so it should not be instantiated.

Included Modules:

Comparable

Instance Methods:

+ n

Returns n.

- n

Returns n negated.

n + num

n - num

n * num

n / num

Performs arithmetic operations: addition, subtraction, multiplication, and division.

n % num

Returns the modulus of n.

n ** num

Exponentiation.

n.abs

Returns the absolute value of n.

n.ceil

Returns the smallest integer greater than or equal to n.

n.coerce( num)

Returns an array containing num and n both possibly converted to a type that allows them to be operated on mutually. Used in automatic type conversion in numeric operators. |

n.divmod( num)

Returns an array containing the quotient and modulus from dividing n by num.

n.floor

Returns the largest integer less than or equal to n. |

1.2.floor #=> 1 2.1.floor #=> 2 (-1.2).floor #=> -2 (-2.1).floor #=> -3

n.integer?

Returns true if n is an integer.

n.modulo( num)

Returns the modulus obtained by dividing n by num and rounding the quotient with floor. Equivalent to n.divmod(num)[1].

n.nonzero?

Returns n if it isn't zero, otherwise nil.

n.remainder( num)

Returns the remainder obtained by dividing n by num and removing decimals from the quotient. The result and n always have same sign. |

(13.modulo(4)) #=> 1 (13.modulo(-4)) #=> -3 ((-13).modulo(4)) #=> 3 ((-13).modulo(-4)) #=> -1 (13.remainder(4)) #=> 1 (13.remainder(-4)) #=> 1 ((-13).remainder(4)) #=> -1 (-13).remainder(-4)) #=> -1

n.round

Returns n rounded to the nearest integer.

1.2.round #=> 1 2.5.round #=> 3 (-1.2).round #=> -1 (-2.5).round #=> -3

n.truncate

Returns n as an integer with decimals removed.

1.2.truncate #=> 1 2.1.truncate #=> 2 (-1.2).truncate #=> -1 (-2.1).truncate #=> -2

n.zero?

Returns zero if n is 0.