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Checking the first character of an Icon string

You can check to see if a given string starts with a particular character or type of character using the Icon function ``any ( c, s )''.

• The first argument c must be a cset (see describing csets of characters (csets) in Icon).
• The second argument s is the string to be checked.
• If the first character of s is in the cset c, the ``any()'' function succeeds and produces the value 1.
• If the first character of s is not in the cset c, the ``any()'' function fails.