diff options
Diffstat (limited to 'Doc/Zsh/arith.yo')
| -rw-r--r-- | Doc/Zsh/arith.yo | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/Doc/Zsh/arith.yo b/Doc/Zsh/arith.yo index 5c334ce9c..1dcd18cad 100644 --- a/Doc/Zsh/arith.yo +++ b/Doc/Zsh/arith.yo @@ -7,7 +7,8 @@ cindex(arithmetic evaluation) cindex(evaluation, arithmetic) findex(let, use of) The shell can perform integer and floating point arithmetic, either using -the builtin tt(let), or via a substitution of the form tt($((...))). For +the builtin tt(let), or via a substitution of the form +tt($LPAR()LPAR())var(...)tt(RPAR()RPAR()). For integers, the shell is usually compiled to use 8-byte precision where this is available, otherwise precision is 4 bytes. This can be tested, for example, by giving the command `tt(print - $(( 12345678901 )))'; if the @@ -40,7 +41,7 @@ cindex(arithmetic base) cindex(bases, in arithmetic) Integers can be in bases other than 10. A leading `tt(0x)' or `tt(0X)' denotes hexadecimal and a leading -`tt(0b)' or `tt(0B) binary. +`tt(0b)' or `tt(0B)' binary. Integers may also be of the form `var(base)tt(#)var(n)', where var(base) is a decimal number between two and thirty-six representing the arithmetic base and var(n) @@ -100,8 +101,8 @@ shown may vary). pindex(C_BASES, use of) pindex(OCTAL_ZEROES, use of) -If the tt(C_BASES) option is set, hexadecimal numbers in the standard C -format, for example tt(0xFF) instead of the usual `tt(16#FF)'. If the +If the tt(C_BASES) option is set, hexadecimal numbers are output in the standard C +format, for example `tt(0xFF)' instead of the usual `tt(16#FF)'. If the option tt(OCTAL_ZEROES) is also set (it is not by default), octal numbers will be treated similarly and hence appear as `tt(077)' instead of `tt(8#77)'. This option has no effect on the output of bases other than @@ -175,7 +176,7 @@ endsitem() Note the precedence of exponentiation in both cases is below that of unary operators, hence `tt(-3**2)' evaluates as `tt(9)', not -tt(-9). Use parentheses where necessary: `tt(-(3**2))'. This is +`tt(-9)'. Use parentheses where necessary: `tt(-(3**2))'. This is for compatibility with other shells. cindex(mathematical functions, use of) @@ -190,12 +191,12 @@ functions. An expression of the form `tt(##)var(x)' where var(x) is any character sequence such as `tt(a)', `tt(^A)', or `tt(\M-\C-x)' gives the value of -this character and an expression of the form `tt(#)var(foo)' gives the -value of the first character of the contents of the parameter var(foo). +this character and an expression of the form `tt(#)var(name)' gives the +value of the first character of the contents of the parameter var(name). Character values are according to the character set used in the current locale; for multibyte character handling the option tt(MULTIBYTE) must be -set. Note that this form is different from `tt($#)var(foo)', a standard -parameter substitution which gives the length of the parameter var(foo). +set. Note that this form is different from `tt($#)var(name)', a standard +parameter substitution which gives the length of the parameter var(name). `tt(#\)' is accepted instead of `tt(##)', but its use is deprecated. Named parameters and subscripted arrays can be referenced by name within an |