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.

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

$\mathrm{false}$

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

$\mathrm{true}$

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

$\mathrm{false}$

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

$\mathrm{false}$

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

$\mathrm{false}$