Data Conversion Routines

Routine	Attributes	Description
abs	reentrant	Generates the absolute value of an integer type.
atof		Converts a string to a float.
atoi		Converts a string to an int.
atol		Converts a string to a long.
labs	reentrant	Generates the absolute value of a long type.
strtod		Converts a string to a float.
strtol		Converts a string to a long.
strtoul		Converts a string to an unsigned long.

The data conversion routines convert strings of ASCII characters to numbers. All of these routines are implemented as functions and most are prototyped in stdlib.h. The abs and labs functions are prototyped in math.h.