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ft_isalpha.c
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ft_isalpha.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_isalpha.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: pvaladar <pvaladar@student.42lisboa.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/02/16 16:08:06 by pvaladar #+# #+# */
/* Updated: 2022/03/10 15:38:10 by pvaladar ### ########.fr */
/* */
/* ************************************************************************** */
// ISALPHA(3) Library Functions Manual ISALPHA(3)
//
// NAME
// isalpha – alphabetic character test
//
// LIBRARY
// Standard C Library (libc, -lc)
//
// SYNOPSIS
// #include <ctype.h>
//
// int isalpha(int c);
//
// DESCRIPTION
// The isalpha() function tests for any character for which isupper(3) or
// islower(3) is true. The value of the argument must be representable
// as an unsigned char or the value of EOF.
//
// In the ASCII character set, this includes the following characters
// (preceded by their numeric values, in octal):
//
// 101 ``A'' 102 ``B'' 103 ``C'' 104 ``D'' 105 ``E''
// 106 ``F'' 107 ``G'' 110 ``H'' 111 ``I'' 112 ``J''
// 113 ``K'' 114 ``L'' 115 ``M'' 116 ``N'' 117 ``O''
// 120 ``P'' 121 ``Q'' 122 ``R'' 123 ``S'' 124 ``T''
// 125 ``U'' 126 ``V'' 127 ``W'' 130 ``X'' 131 ``Y''
// 132 ``Z'' 141 ``a'' 142 ``b'' 143 ``c'' 144 ``d''
// 145 ``e'' 146 ``f'' 147 ``g'' 150 ``h'' 151 ``i''
// 152 ``j'' 153 ``k'' 154 ``l'' 155 ``m'' 156 ``n''
// 157 ``o'' 160 ``p'' 161 ``q'' 162 ``r'' 163 ``s''
// 164 ``t'' 165 ``u'' 166 ``v'' 167 ``w'' 170 ``x''
// 171 ``y'' 172 ``z''
//
// RETURN VALUES
// The isalpha() function returns zero if the character tests false and
// returns non-zero if the character tests true.
int ft_isalpha(int c)
{
return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
}