`namelengthmax`

Maximum length of a variable, function or field name.

Category: Programming > Functions

Syntax

N = namelengthmax

Returns the longest name length that is accepted.

Description

Identifiers longer than namelengthmax characters are not valid. Code that generates names programmatically, for example from table headers or file names, can compare against this value or truncate to it. matlab.lang.makeValidName applies the limit automatically.

Output arguments

N: Double scalar with the limit, 63.

Example

Reading the limit

N = namelengthmax
name = repmat('a', 1, N + 5);
name = name(1:N);
disp(isvarname(name))

Output

N = 63
   1

See also

isvarname matlab.lang.makeValidName mustBeValidVariableName genvarname