even

Returns true iff its argument is an even number.

Syntax

• even(n)

  • n is an integer

Description

even(n) is true iff n is an even number (that is, on the form 2m for some integer m).

If the argument isn’t an integer, an error is generated.

Examples

pick(SequenceList(1000) @ prime, even)

2

L ≔ SequenceList(1000); count(L, even)/#L

1/2	(=0.5)

L ≔ SequenceList(10000) @ (n ↦ mod(n^2, 19)); count(L, even)/#L

737/2000	(=0.3685)

See also

• odd