EvenQ¶

Status: Stable

documented, exercised by the test suite and/or worked examples, with no known limitations recorded.

Description¶

EvenQ[n]

gives True if n is an even integer (Integer or BigInt), False otherwise.

Examples (2)¶

Every input below was run against the current Mathilda build and its output recorded.

Applications (2)¶

In[1]:= EvenQ[4]
Out[1]= True

In[2]:= EvenQ[7]
Out[2]= False

Implementation notes¶

builtin_evenq (src/core.c) returns True for an EXPR_INTEGER with n % 2 == 0, uses mpz_even_p for an EXPR_BIGINT, and returns False for everything else.

Attributes: Protected.

References¶

See also: OddQ

Source: src/core.c
Specification: docs/spec/builtins/expression-information.md
Tests: tests/test_backtrack.c
Tests: tests/test_bigint.c
Tests: tests/test_compiledfunction.c
Tests: tests/test_core.c

Notes & additional examples¶

Notes¶

EvenQ returns True only for even integers (Integer or BigInt); any non-integer argument gives False.