isprime - Determine which array elements are prime - MATLAB (original) (raw)

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Determine which array elements are prime

Syntax

Description

TF = isprime([X](#btsyhna-1-X)) returns a logical array containing1 (true) where the elements of the array X are prime numbers, and 0 (false) where they are not.

example

Examples

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tf = isprime([2 3 0 6 10])

tf = 1×5 logical array

1 1 0 0 0

2 and 3 are prime, but 0, 6, and 10 are not.

x = uint16([333 71 99]); tf = isprime(x)

tf = 1×3 logical array

0 1 0

71 is prime, but 333 and 99 are not.

Input Arguments

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Input values, specified as a scalar, vector, or array of real, nonnegative integer values.

Example: 17

Example: [1 2 3 4]

Example: int16([127 255 4095])

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Extended Capabilities

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Usage notes and limitations:

• The maximum double precision input is 2^33.
• The maximum single precision input is 2^25.
• The input X cannot have type int64 or uint64.

Version History

Introduced before R2006a