The type( expr, 'character' ) command verifies if expr is of type character. It returns true if expr is of type character, and false otherwise. A character is defined as a string with length equal to one.

$\mathrm{type}\left(2.3\,'\mathrm{character}'\right)$

$\mathrm{false}$

$\mathrm{type}\left(''f''\,'\mathrm{character}'\right)$

$\mathrm{true}$

$\mathrm{type}\left(''foo''\,'\mathrm{character}'\right)$

$\mathrm{false}$

$\mathrm{type}\left(a\,'\mathrm{character}'\right)$

$\mathrm{false}$

$\mathrm{type}\left(''''\,'\mathrm{character}'\right)$

$\mathrm{false}$