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isgreater(3) -- compare two floating-point numbers
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Each of the macros isgreater(), isgreaterequal(), isless(), islessequal(), and islessgreater() take arguments x and y and return a non-zero value if and only if its nominal relation on x and y is true... |
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isgreaterequal(3) -- compare two floating-point numbers
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Each of the macros isgreater(), isgreaterequal(), isless(), islessequal(), and islessgreater() take arguments x and y and return a non-zero value if and only if its nominal relation on x and y is true... |
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ishexnumber(3) -- hexadecimal-digit character test
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The isxdigit() function tests for any hexadecimal-digit character. For any locale, this includes the following characters only: ``0'' ``1'' ``2'' ``3'' ``4'' ``5'' ``6'' ``7'' ``8'' ... |
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isinf(3) -- classify a floating-point number
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The fpclassify() macro takes an argument of x and returns one of the following manifest constants. FP_INFINITE Indicates that x is an infinite number. FP_NAN Indicates that x is not a number (NaN). FP... |
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isless(3) -- compare two floating-point numbers
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Each of the macros isgreater(), isgreaterequal(), isless(), islessequal(), and islessgreater() take arguments x and y and return a non-zero value if and only if its nominal relation on x and y is true... |
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islessequal(3) -- compare two floating-point numbers
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Each of the macros isgreater(), isgreaterequal(), isless(), islessequal(), and islessgreater() take arguments x and y and return a non-zero value if and only if its nominal relation on x and y is true... |
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islessgreater(3) -- compare two floating-point numbers
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Each of the macros isgreater(), isgreaterequal(), isless(), islessequal(), and islessgreater() take arguments x and y and return a non-zero value if and only if its nominal relation on x and y is true... |
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islower(3) -- lower-case character test
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The islower() function tests for any lower-case letters. For single C chars locales (see multibyte(3)) the value of the argument is representable as an unsigned char or the value of EOF. In the ASCII ... |
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isnan(3) -- classify a floating-point number
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The fpclassify() macro takes an argument of x and returns one of the following manifest constants. FP_INFINITE Indicates that x is an infinite number. FP_NAN Indicates that x is not a number (NaN). FP... |
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isnettty(3) -- determine tty type from ttys file entry
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The getttyent(), and getttynam() functions each return a pointer to an object, with the following structure, containing the broken-out fields of a line from the tty description file. struct ttyent { c... |
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isnormal(3) -- classify a floating-point number
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The fpclassify() macro takes an argument of x and returns one of the following manifest constants. FP_INFINITE Indicates that x is an infinite number. FP_NAN Indicates that x is not a number (NaN). FP... |
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isnumber(3) -- decimal-digit character test
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The isdigit() function tests for any decimal-digit character. For any locale, this includes the following characters only: ``0'' ``1'' ``2'' ``3'' ``4'' ``5'' ``6'' ``7'' ``8'' ``9'... |
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isprint(3) -- printing character test (space character inclusive)
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The isprint() function tests for any printing character including space (` '). For single C chars locales (see multibyte(3)) the value of the argument is representable as an unsigned char or the valu... |