XP is just a number PerlMonks

### Re^4: Modulus zero error

 on Dec 24, 2004 at 06:29 UTC ( #417264=note: print w/replies, xml ) Need Help??

in reply to Re^3: Modulus zero error

Eek... I don't understand, got lost at "built a hash table in your while statement" :( (I'm new to perl and programming in general, don't really know all that much about it yet...)

I just want to know why
if ((\$n < \$p[\$i]) & (\$x > 2)) gives me errors and
if ((\$n < \$p[\$i]) & (\$x)) doesn't

I tried use strict, warnings, didn't tell me anything different

Replies are listed 'Best First'.
Re^5: Modulus zero error
by maa (Pilgrim) on Dec 24, 2004 at 07:52 UTC

Can I ask... are you trying to do a Logical short-circuit AND (&&) in your if statement (to make sure both components are "true") or are you intentionaly performing a binary AND (&) on the data?

Nope, that was just me being ignorant... I changed it to &&, but it still behaves the same way

ok.. it would help to know what was in \$p and what you were trying to do. for(;;) loops aren't as commonly used in Perl as they are in C as there are often more convenient idioms.

```#Assume @p is a list of numbers?
my @p=(0..10);

for(\$x = \$prevmax;\$x<=\$max;\$x++){
\$n = sqrt(\$x);
\$i = 0;
#Dividing by 0 is always an error... make sure \$p[\$i] is true
while ( (\$p[\$i]) && (\$x%\$p[\$i] !=0) ) {
\$i++;
if ((\$n < \$p[\$i]) && (\$x > \$p[-1])) {
print (1 & (\$x > \$p[-1])); # <--what are you expecting her
+e
push(@p,\$x."\n");
last;
}
}
}

Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://417264]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (4)
As of 2023-10-02 11:22 GMT
Sections?
Information?
Find Nodes?
Leftovers?
Voting Booth?

No recent polls found

Notices?