Sastry wrote:
> Hi
Hello,
> I have a script that gives error
>
> "Syntax error at /u/isldev3/exp/oper.pl line 7, near ")
> print"
> Execution of /u/isldev3/exp/oper.pl aborted due to compilation errors."
>
> $x =3D 3;
> $y =3D 4;
> $z =3D 3;
>
> if (($x & $y & $z) < 20)
> print "\n Lies below the range";
>
> a) Is it supposed to give error?
Yes.
> b)If so why is the language construct so different compared to any
> structured language like C?
perldoc perlsyn
[snip]
Compound Statements
In Perl, a sequence of statements that defines a scope is called a
block. Sometimes a block is delimited by the file containing it (in
the case of a required file, or the program as a whole), and sometimes
a block is delimited by the extent of a string (in the case of an
eval).
But generally, a block is delimited by curly brackets, also known as
braces. We will call this syntactic construct a BLOCK.
The following compound statements may be used to control flow:
if (EXPR) BLOCK
if (EXPR) BLOCK else BLOCK
if (EXPR) BLOCK elsif (EXPR) BLOCK ... else BLOCK
LABEL while (EXPR) BLOCK
LABEL while (EXPR) BLOCK continue BLOCK
LABEL for (EXPR; EXPR; EXPR) BLOCK
LABEL foreach VAR (LIST) BLOCK
LABEL foreach VAR (LIST) BLOCK continue BLOCK
LABEL BLOCK continue BLOCK
Note that, unlike C and Pascal, these are defined in terms of BLOCKs,
^^^^^^^^^^^^^^^^^^^
not statements. This means that the curly brackets are required--no
^^^^^^^^^^^^^^^^^^^^^^^^^^^
dangling statements allowed. If you want to write conditionals without
curly brackets there are several other ways to do it.
perldoc perltrap
[snip]
C/C++ Traps
Cerebral C and C++ programmers should take note of the following:
ยท Curly brackets are required on "if"'s and "while"'s.
John
--
use Perl;
program
fulfillment
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