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This section describes the following functions, macros and external variables:

• gamma - Logarithmic gamma function
• garbcoll - Release memory space to the system
• gcvt - Convert a floating-point number to a string
• getc - Read a character from a file
• getchar - Read a character from standard input
• getenv - get value of environment variable
• getlogin - Query user ID
• getpgmname - Query program name
• gets - Read a string from standard input
• gettsn - Query TSN (task sequence number)
• getw - Read wordwise from a file
• getwc - Read a wide character from a file
• getwchar - Read a wide character from standard input
• gmtime, gmtime64 - Convert date and time to UTC