The HasDigit(s) command determines whether s has a decimal digit. A character is a decimal digit if it is one of the following:

If s has a decimal digit, HasDigit returns true. Otherwise, false is returned.

All of the StringTools package commands treat strings as (null-terminated) sequences of $8$-bit (ASCII) characters.  Thus, there is no support for multibyte character encodings, such as unicode encodings.

The StringTools[HasDigit] command is thread-safe as of Maple 15.

For more information on thread safety, see index/threadsafe.

$\mathrm{with}\left(\mathrm{StringTools}\right)\:$

$\mathrm{HasDigit}\left(''abcdEFG''\right)$

$\mathrm{false}$

$\mathrm{HasDigit}\left(''abc123dEFG''\right)$

$\mathrm{true}$