home | O'Reilly's CD bookshelfs | FreeBSD | Linux | Cisco | Cisco Exam    

Book Home Programming PerlSearch this book

3.4. Exponentiation

Binary ** is the exponentiation operator. Note that it binds even more tightly than unary minus, so -2**4 is -(2**4), not (-2)**4. The operator is implemented using C's pow(3) function, which works with floating-point numbers internally. It calculates using logarithms, which means that it works with fractional powers, but you sometimes get results that aren't as exact as a straight multiplication would produce.



Library Navigation Links

Copyright © 2002 O'Reilly & Associates. All rights reserved.











??????????????@Mail.ru