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Chapter 4. CONSTANTS, VARIABLES, AND DAT... > 4.8 The HLA Standard Library CHARS.H...
4.8. 4.8 The HLA Standard Library CHARS.HHF Module
The HLA Standard Library chars.hhf module provides a couple of routines that convert characters from one form to another and several routines that classify characters according to their graphic representation. These functions are especially useful for processing user input to verify that it is correct.
The first two routines we will consider are the translation/conversion functions. These functions are chars.toUpper and chars.toLower. These functions use the following syntax:
