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Top Forums Shell Programming and Scripting If statement falling over on a null record. Help please. Post 302072230 by buffoonix on Saturday 29th of April 2006 03:47:28 PM
Old 04-29-2006
If you are using a Posix shell you should switch to the double square brackets test operator
e.g.

if [[ -n $acc ]]; then
echo \$acc defined
fi
 

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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 next 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 Ratfor is best used with f77(1). SEE ALSO
f77(1) B. W. Kernighan and P. J. Plauger, Software Tools, Addison-Wesley, 1976. 7th Edition April 29, 1985 RATFOR(1)
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