numel

Total number of elements.

Syntax

n = numel(A)

Description

Returns the total element count of A — the product of all dimension sizes. Equivalent to prod(size(A)). For an empty array, returns 0.

The MATLAB-compatible indexed form numel(A, idx1, idx2, ...) is reserved but currently raises a runtime error.

Examples

numel([1 2 3 4])       % 4
numel(zeros(3,5))      % 15
numel([])              % 0

See also

• size — Sizes along all dimensions, or along one specific dimension.
• length — Length of the longest dimension.
• ndims — Number of dimensions of the input.
• isempty — Test whether the input has zero elements.