
Library Functions Run Time Environment
4–8 UM004001-COR1103
int isspace( int c );
int isupper( int c );
int isxdigit( int c );
Each function in the is family tests a given integer value, returning a nonzero value if the
integer satisfies the test condition and 0 if it does not. The ASCII character set is assumed.
The is functions and their test conditions are listed below:
Parameter Description
c
Interger to be tested
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