Arbitrary Precision Arithmetic (The GNU Awk User’s Guide)
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16 Arithmetic and Arbitrary-Precision Arithmetic with gawk
This chapter introduces some basic concepts relating to how computers do arithmetic and defines some important terms. It then proceeds to describe floating-point arithmetic, which is what awk
uses for all its computations, including a discussion of arbitrary-precision floating-point arithmetic, which is a feature available only in gawk
. It continues on to present arbitrary-precision integers, and concludes with a description of some points where gawk
and the POSIX standard are not quite in agreement.
NOTE: Most users of
gawk
can safely skip this chapter. But if you want to do scientific calculations withgawk
, this is the place to be.
• Computer Arithmetic | A quick intro to computer math. | |
• Math Definitions | Defining terms used. | |
• MPFR features | The MPFR features in gawk .
| |
• FP Math Caution | Things to know. | |
• Arbitrary Precision Integers | Arbitrary Precision Integer Arithmetic with gawk .
| |
• Checking for MPFR | How to check if MPFR is available. | |
• POSIX Floating Point Problems | Standards Versus Existing Practice. | |
• Floating point summary | Summary of floating point discussion. |