IntegerPart

IntegerPart[x] gives the integer part of x.

Mathematical function (see Section A.3.10).

IntegerPart[x] in effect takes all digits to the left of the decimal point and drops the others.

Examples: IntegerPart[2.4] ; IntegerPart[2.6] ; IntegerPart[-2.4] ; IntegerPart[-2.6] .

IntegerPart[x] + FractionalPart[x] is always exactly x.

IntegerPart[x] returns an integer when x is any numeric quantity, whether or not it is an explicit number.

Example: IntegerPart[Pi^2] .

For exact numeric quantities, IntegerPart internally uses numerical approximations to establish its result. This process can be affected by the setting of the global variable $MaxExtraPrecision.

See Section 3.2.2.

See also: FractionalPart, Round, Floor, Ceiling, Chop.

New in Version 3.