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(libc.info)Parsing of Numbers

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Parsing of Numbers
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   This section describes functions for "reading" integer and
floating-point numbers from a string.  It may be more convenient in some
cases to use `sscanf' or one of the related functions; see Note:
Formatted Input.  But often you can make a program more robust by
finding the tokens in the string by hand, then converting the numbers
one by one.

Parsing of Integers

Functions for conversion of integer values.

Parsing of Floats

Functions for conversion of floating-point

values.