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One more point about the use of a dollar sign.

If you use the vertical format,the fraction bar acts like parentheses. The Order ofOperationsCombinewhat’s inside parentheses.Exponentsand rootsMultiplicationsand divisionsAdditionsand subtractions. Rules forParentheses0+ - Rulesfor Exponents Definition=

So the following piece of code prints two

The format isYou can append to an existing file, by using">>:" Like the shell, the double angle bracketsindicates output is appended to the file, instead of written to an empty file.

I have a long list of complaints about using the C shell.

If you pipe the output of another program into it, you would generatea lot of meaningless prompts.

I use Javascript for analytics, and to show ads which pay for the maintenanceLast modified: Thu Apr 23 16:37:47 EDT 2015 Part of the And then there's Copyright 1994,1995 Bruce Barnett and General Electric CompanyCopyright 2001, 2004, 2013, 2014 Bruce BarnettAll rights reservedYou are allowed to print copies of this tutorial for your personaluse, and link to this page, but you are not allowed to make electroniccopies, or redistribute this tutorial in any form without permission.


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You can pipe the output of "ls -s" into this filter to count the number of files, the total size, and theaverage size.

You can make the output field separator any number of characters.

The largest total will be the one for all files, so this will be oneof the first lines output.

There is one minor problem with associative arrays, especiallyif you use the command to output each element: you have no control over the orderof output.

I suggest


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or even better


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The last example, by using string variables for formatting, allows youto keep all of the formats together.

The following prints every line until a
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write out the expression according to the definition of the power

PI=3.14159;# select an "Ed Sullivan" number - really really big BIG=999999; # pick two formats# Keep them close together, so when one column is made larger# the other column can be adjusted to be the same width fmt1="%7s %8s %8s %8s %10s %10s %10s %10sn";# print out the title of each column fmt2="%7d %8.2f %8.2f %8.2f %10.2f %10.2f %10.2f %10.2fn";# old AWK wants a backslash at the end of the next line# to continue the print statement# new AWK allows you to break the line into two, after a comma printf(fmt1, "Degrees", "Radians", "Cosine", "Sine", "Tangent", "Cotangent", "Secant", "Cosecant"); for (i=0;i
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NAWK also has the arctangent function.

the exponent outside the parenthesis ..

If you gave this program an empty file for input,you would get the error:Also, if you piped the output of"ls -l" to it, the line that specified the totalwould increment a non-existing user.

Negative Exponents Inside and Outside of Parentheses

This allows you to print the last field of any column

#!/bin/awk -f
{ print $NF; }

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One warning about AWK.

Negative exponents outside parentheses - Free Math …

I thought this was very strange at first, but after pulling out somehair, kicking the deck, and yelling at muself and everyone who hadanything to do with the development of UNIX, it is intuitively obvious.

Write out the meaning of these symbols

what is the difference between using logarithms and regular arithmetic# note - exp and log are natural log functions - not base 10#BEGIN {# what is the about of error that will be reported?

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