mathjs/docs/reference/functions/re.md

Function re

Get the real part of a complex number. For a complex number a + bi, the function returns a.

For matrices, the function is evaluated element wise.

Syntax

math.re(x)

Parameters

Parameter	Type	Description
x	Number | BigNumber | Complex | Array | Matrix | Boolean | null	A complex number or array with complex numbers

Returns

Type	Description
Number | BigNumber | Array | Matrix	The real part of x

Examples

var a = math.complex(2, 3);
math.re(a);                     // returns Number 2
math.im(a);                     // returns Number 3

math.re(math.complex('-5.2i')); // returns Number 0
math.re(math.complex(2.4));     // returns Number 2.4

See also

im, conj, abs, arg