difference between == and =


 
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# 8  
Old 05-21-2006
Code:
if( $3 == "R001" )
        print "xxx";
      else
      print "yyy";
fi

This does not appear to make any sense to me as a ksh example, the test is not numerical and the syntax does not work. I'm pretty sure that it would give a shell error.
 
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fdim(3M)																  fdim(3M)

NAME
fdim(), fdimf(), fdiml(), fdimw(), fdimq() - positive difference functions SYNOPSIS
HP Integrity Server Only DESCRIPTION
The function determines the positive difference between its arguments. Integrity Server Only is a version of it takes arguments and returns a result. is a version of it takes arguments and returns a result. is an version of it takes arguments and returns an result. is equivalent to on HP-UX systems. USAGE
To use this function, compile either with the default option or with the and options. To use (for Integrity servers) or compile with the option. Make sure your program includes Link in the math library by specifying on the compiler or linker command line. RETURN VALUE
The function returns the positive difference between x and y. If x y, returns x y (and raises any exceptions resulting from the subtraction). If x y, returns +zero. If x or y is NaN, returns NaN. If both arguments are NaNs, returns NaN. returns a positively signed infinity in lieu of a value whose magnitude is too large, and raises the overflow and inexact exceptions. ERRORS
No errors are defined. SEE ALSO
fdim(3M), fmin(3M), math(5). STANDARDS CONFORMANCE
: ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'') fdim(3M)