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Page A5 tolower(ch) Parameter: Function return value: A char value ch A character that is the lowercase equivalent of ch, if ch is an uppercase letter ch, otherwise toupper(ch) Parameter: Function return value: A char value ch A character that is the uppercase equivalent of ch, if ch is a lowercase letter ch, otherwise The Header File float.h This header file supplies named constants that define the characteristics of floating point numbers on your particular machine. Among these constants are the following: FLT_DIG Approximate number of significant digits in a float value on your machine FLT_MAX Maximum positive float value on your machine FLT_MIN Minimum positive float value on your machine DBL_DIG Approximate number of significant digits in a double value on your machine DBL_MAX Maximum positive double value on your machine DBL_MIN Minimum positive double value on your machine LDBL_DIG Approximate number of significant digits in a long double value on your machine LDBL_MAX Maximum positive long double value on your machine LDBL_MIN Minimum positive long double value on your machine The Header File limits.h This header file supplies named constants that define the limits of integer values on your particular machine. Among these constants are the following: CHAR_BITS Number of bits in a byte on your machine (8, for example) CHAR_MAX Maximum char value on your machine CHAR_MIN Minimum char value on your machine SHRT_MAX Maximum short value on your machine SHRT_MIN Minimum short value on your machine INT_MAX Maximum int value on your machine INT_MIN Minimum int value on your machine LONG_MAX Maximum long value on your machine
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