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multiple of 10

multiple of 10

multiple of 10

(OP)
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

RE: multiple of 10

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

RE: multiple of 10

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

RE: multiple of 10

(OP)
thanks a lot for your help.

RE: multiple of 10

(OP)
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?

RE: multiple of 10

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

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