OddQ

Status: Stable

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

Description

OddQ[n] gives True if n is an odd 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]:= OddQ[7]
Out[1]= True

In[2]:= OddQ[4]
Out[2]= False

Implementation notes

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

Attributes: Protected.

References

See also: EvenQ

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

Notes & additional examples

Notes

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