multiple of 10

[tonyjob]

if i had a number in a variable how could i check it to see if its a multiple of 10 (10,20,140,900,etc..) i figure if i divide the number by 10 and it makes a whole number it will be a multiple, but how could i check the number to see if it is a whole number?

any help or comments will be apreciated.

~Tony

 

[goBoating]

use the 'int' function to see if you have a decimal portion

or

pattern match it like this....

if ($num =~ /\.\d/) { print "I contain a decimal followed by a digit.\n"; }

or

ponder.....ponder....... TMTOWTDI




keep the rudder amid ship and beware the odd typo

 

[tanderso]

Use the modulus (remainder of a division)

if ($num % 10 == 0) {$multiple = true;}
Sincerely,

Tom Anderson
CEO, Order amid Chaos, Inc.

http://www.oac-design.com

 

[tonyjob]

thanks a lot for your help.

 

[tonyjob]

tanderso,
could you please give me a bit more info about modulus.

what would this return: 100 % 10
would it be 0 or would it be an error?
and would this work: $mod = 100 % 10
would $mod = null, empty, or 0?

 

[tanderso]

x % y returns the remainder of x / y.

100/10=10 with a remainder of 0, so
100%10=0

yes, you can set $mod = 100 % 10... it will equal 0.
Sincerely,

Tom Anderson
CEO, Order amid Chaos, Inc.

http://www.oac-design.com