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Shell Programming and Scripting

bc error

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# 1  
Old 04-22-2012
bc error
Whenever I use bc to compare two numbers, I get a "syntax error on line 1, teletype" error. I've tried simpler expressions like
echo '1 > 2' | bc
...but the error still occurs. Is it a problem with versions? If so, how should I fix it?
# 2  
Old 04-22-2012
What is the exact command that you use: These are two different quotes.
# 3  
Old 04-22-2012
I guess I didn't change it in time, sorry. Should be:
Code:
echo '1 > 2' | bc

I've tried both " " and ' ', though, and neither work
Last edited by Scrutinizer; 04-22-2012 at 05:17 AM.. Reason: code tags
# 4  
Old 04-22-2012
I get
Code:
$ echo '1 > 2' | bc
0

So you get "syntax error on line 1, teletype", when issuing this simple command, is that correct? What is your OS and version?
# 5  
Old 04-22-2012
Sun 5.10

edit:
and yes, I do get the error instead of 0. Same if I try to use it interactively:

Code:
bc
1 > 2
syntax error on line 1, teletype

Last edited by Scrutinizer; 04-22-2012 at 05:30 AM.. Reason: You need to put the [code] [/code] sequence around the test, so first select and then click the "code" button
# 6  
Old 04-22-2012
See if
Code:
/usr/xpg6/bin/bc

works
# 7  
Old 04-22-2012
It won't. '1 > 2' is an incorrect statement as far as the bc standard is concerned.

Code:
Unlike all other operators, the relational operators
( '<', '>', "<=", ">=", "==", "!=" ) shall be only valid as the
object of an if, while, or inside a for statement.

These 2 Users Gave Thanks to jlliagre For This Post:
Scrutinizer timiksy
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