Description:
Determine whether a
character is alphanumeric, i.e. A - Z, a - z, 0 - 9 or _. Note that this routine treats the underscore
character as an alphanumeric character.
Invocation
RESULT = CHR_ISALM( CVALUE )
Arguments
CVALUE = CHARACTER (Given)
The character to be tested.
Returned Value
CHR_ISALM =
LOGICAL
Returns .TRUE. if the given character is alphanumeric, returns .FALSE. otherwise.
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