mathjs/docs/reference/functions/floor.md

Function floor

Round a value towards minus infinity. For matrices, the function is evaluated element wise.

Syntax

math.floor(x)

Parameters

Parameter	Type	Description
x	Number | BigNumber | Boolean | Complex | Array | Matrix | null	Number to be rounded

Returns

Type	Description
Number | BigNumber | Complex | Array | Matrix	Rounded value

Examples

math.floor(3.2);              // returns Number 3
math.floor(3.8);              // returns Number 3
math.floor(-4.2);             // returns Number -5
math.floor(-4.7);             // returns Number -5

var c = math.complex(3.2, -2.7);
math.floor(c);                // returns Complex 3 - 3i

math.floor([3.2, 3.8, -4.7]); // returns Array [3, 3, -5]

See also

ceil, fix, round