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Apache C++ Standard Library Reference Guide

isdigit()

Library:  Localization


Function

Local Index

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Summary

Locale convenience function that determines if a character is a decimal digit

Synopsis

#include <locale>

namespace std {
  template <class charT> 
  bool isdigit(charT c, const locale& loc);
}

Description

The isdigit() function returns true if the character passed as a parameter is a decimal digit. Otherwise, the function returns false. The check is made using the ctype facet from the locale parameter.

See Also

ctype, locale, isalnum(), isalpha(), iscntrl(), isgraph(), islower(), isprint(), ispunct(), isspace(), isupper(), isxdigit()

Standards Conformance

ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 22.1.3.1



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