04-27-2007
2 solutions
export A=1188
export B=1454.07
awk 'BEGIN{Fraction=ENVIRON["A"] / ENVIRON["B"];
printf("%0.2f%%\n", Fraction)}'
awk 'BEGIN{Fraction='$A' / '$B';
printf("%0.2f%%\n", Fraction)}'
0.82%
0.82%
The first may have issues with some awks, but I prefer it myself.
The latter is more universal, but be sure and not put any spaces before or after the $A and $B. It does not have the have the variables exported.
To me the first is easier to debug, which is why I prefer it.
Neither have error coding - left to you - ie. non-numerics or dividing by zero error.
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LEARN ABOUT OPENSOLARIS
let
let(1) User Commands let(1)
NAME
let - shell built-in function to evaluate one or more arithmetic expressions
SYNOPSIS
ksh
let arg...
ksh93
let [expr...]
DESCRIPTION
ksh
Each arg is a separate arithmetic expression to be evaluated.
ksh93
let evaluates each expr in the current shell environment as an arithmetic expression using ANSI C syntax. Variables names are shell vari-
ables and they are recursively evaluated as arithmetic expressions to get numerical values. let has been made obsolete by the ((...)) syn-
tax of ksh93(1) which does not require quoting of the operators to pass them as command arguments.
EXIT STATUS
ksh
ksh returns the following exit values:
0 The value of the last expression is non-zero.
1 The value of the last expression is zero.
ksh93
ksh93 returns the following exit values:
0 The last expr evaluates to a non-zero value.
>0 The last expr evaluates to 0 or an error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
ksh(1), ksh93(1), set(1), typeset(1), attributes(5)
SunOS 5.11 2 Nov 2007 let(1)