Let (bash) - Revision history

Heth at 16:28, 28 February 2010

2010-02-28T16:28:45Z

Heth at 15:33, 24 August 2009

2009-08-24T15:33:37Z

Heth at 15:33, 24 August 2009

2009-08-24T15:33:16Z

Heth at 15:05, 24 August 2009

2009-08-24T15:05:53Z

Heth: New page:

 let: let arg [arg ...]     Each ARG is an arithmetic expression to be evaluated.  Evaluation     is done in fixed-width integers with no check for overflow, though     division by 0 ...

2009-08-24T15:05:30Z

New page: <pre> let: let arg [arg ...] Each ARG is an arithmetic expression to be evaluated. Evaluation is done in fixed-width integers with no check for overflow, though division by 0 ...

New page

<pre>
let: let arg [arg ...]
Each ARG is an arithmetic expression to be evaluated. Evaluation
is done in fixed-width integers with no check for overflow, though
division by 0 is trapped and flagged as an error. The following
list of operators is grouped into levels of equal-precedence operators.
The levels are listed in order of decreasing precedence.

id++, id-- variable post-increment, post-decrement
++id, --id variable pre-increment, pre-decrement
-, + unary minus, plus
!, ~ logical and bitwise negation
** exponentiation
*, /, % multiplication, division, remainder
+, - addition, subtraction
<<, >> left and right bitwise shifts
<=, >=, <, > comparison
==, != equality, inequality
& bitwise AND
^ bitwise XOR
| bitwise OR
&& logical AND
|| logical OR
expr ? expr : expr
conditional operator
=, *=, /=, %=,
+=, -=, <<=, >>=,
&=, ^=, |= assignment

Shell variables are allowed as operands. The name of the variable
is replaced by its value (coerced to a fixed-width integer) within
an expression. The variable need not have its integer attribute
turned on to be used in an expression.

Operators are evaluated in order of precedence. Sub-expressions in
parentheses are evaluated first and may override the precedence
rules above.

If the last ARG evaluates to 0, let returns 1; 0 is returned
otherwise.
</pre>
{{#css:

pre { font-family: Lucida Console; font-weight: bold; font-size: 14px; color: #00FF00; background: black; margin: 10px 50px; width: 800px; line-height: 100%; overflow: auto;}
}}

@@ Line 41: / Line 41: @@
      otherwise.
 </source>
-{{#css:
+{{Source cli}}
 [[category:bash]]

@@ Line 1: / Line 1: @@
+<source lang=cli>
 [heth@mars ~]$ <input>help let</input>
 let: let arg [arg ...]
@@ Line 41: / Line 40: @@
      If the last ARG evaluates to 0, let returns 1; 0 is returned
      otherwise.
-</pre>
+</source>
 {{#css:

← Older revision		Revision as of 15:05, 24 August 2009
Line 44:		Line 44:
	pre { font-family: Lucida Console; font-weight: bold; font-size: 14px; color: #00FF00; background: black; margin: 10px 50px; width: 800px; line-height: 100%; overflow: auto;}		pre { font-family: Lucida Console; font-weight: bold; font-size: 14px; color: #00FF00; background: black; margin: 10px 50px; width: 800px; line-height: 100%; overflow: auto;}
	}}		}}
		+	[[category:bash]]