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Standard library header
<ctype.h>
From cppreference.com
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c
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header
C
Compiler support
Language
Headers
Type support
Program utilities
Variadic function support
Error handling
Dynamic memory management
Strings library
Algorithms
Numerics
Date and time utilities
Input/output support
Localization support
Concurrency support
(C11)
Technical Specifications
Symbol index
[edit]
Standard Library headers
<assert.h>
<complex.h>
(C99)
<ctype.h>
<errno.h>
<fenv.h>
(C99)
<float.h>
<inttypes.h>
(C99)
<iso646.h>
(C95)
<limits.h>
<locale.h>
<math.h>
<setjmp.h>
<signal.h>
<stdalign.h>
(
C11*
)
<stdarg.h>
<stdatomic.h>
(C11)
<stdbit.h>
(C23)
<stdbool.h>
(
C99*
)
<stdckdint.h>
(C23)
<stddef.h>