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Top Forums Shell Programming and Scripting Bash: evaluating $? variable (if statement) Post 302212398 by aristegui on Monday 7th of July 2008 12:24:20 PM
Old 07-07-2008
Bash: evaluating $? variable (if statement)

Hello, i'm unable to write a correct if... statement to evaluate the $? variable.

Could anybody send to me an example? for example, this lines of code didn't work...

if [ $? eq 0 ]; then
etc etc

if [ $? == 0 ]; then
etc etc

Thank you in advanced.
 

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RATFOR(1)						      General Commands Manual							 RATFOR(1)

NAME
ratfor - rational Fortran dialect SYNOPSIS
ratfor [ option ... ] [ filename ... ] DESCRIPTION
Ratfor converts a rational dialect of Fortran into ordinary irrational Fortran. Ratfor provides control flow constructs essentially iden- tical to those in C: statement grouping: { statement; statement; statement } decision-making: if (condition) statement [ else statement ] switch (integer value) { case integer: statement ... [ default: ] statement } loops: while (condition) statement for (expression; condition; expression) statement do limits statement repeat statement [ until (condition) ] break [n] next [n] and some syntactic sugar to make programs easier to read and write: free form input: multiple statements/line; automatic continuation comments: # this is a comment translation of relationals: >, >=, etc., become .GT., .GE., etc. return (expression) returns expression to caller from function define: define name replacement include: include filename The option -h causes quoted strings to be turned into 27H constructs. -C copies comments to the output, and attempts to format it neatly. Normally, continuation lines are marked with a & in column 1; the option -6x makes the continuation character x and places it in column 6. Ratfor is best used with f77(1). SEE ALSO
f77(1) B. W. Kernighan and P. J. Plauger, Software Tools, Addison-Wesley, 1976. RATFOR(1)
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