isvarname

Test whether a string is a valid variable name.

Syntax

tf = isvarname(str)

Description

Returns true if str would be a valid variable identifier — starts with a letter, followed only by letters, digits, or underscores, AND is not a reserved keyword.

Examples

isvarname('myVar')       % 1
isvarname('123abc')      % 0  (starts with digit)
isvarname('for')         % 0  (keyword)

See also

• iskeyword — Test whether a string is a reserved keyword.
• exist — Check whether a name exists in the workspace, on disk, or as a built-in.