Question on division (Java) - Also Perl, PHP, Python ...

For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))

Q:

What's the difference between % and /?

A:

/ returns the result of a division
% returns the remainder when you do a division.

Divide 18 by 7 you get 2, with a remainder of 4 (i.e. 4 left over).

so 18/7 give 2, and 18%7 gives 4.

And from Tcl/Tk and Expect... you can see the float v integer considerations of a division!

% expr 18 / 7

2

% expr 18. / 7

2.57142857143

% expr 18 % 7

4

%

(written 2007-11-28, updated 2008-09-15)

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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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