Sum and average even numbers
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Write a code that can add all the even numbers less than and including 50 and to find their average.
You can use the basic loop commands,colon operators and basic arithmetic operators.
10 Comments
Walter Roberson
on 15 Apr 2011
There is are some serious questions here suitable for implementation in MATLAB. See the following for details of calculations:
http://www.style.org/unladenswallow/
Answers (4)
Matt Tearle
on 14 Apr 2011
Why bother? The answer is -Inf. Your teacher needs to write more precise questions.
4 Comments
Walter Roberson
on 16 Apr 2011
MATLAB doesn't have any negative integers below -realmax so adding the ones "up to -realmax" is going to get you -realmax .
It is not a priori obvious that one would get -inf rather than nan or some other value when doing the calculation you were probably thinking of, so doing the calculation does become worthwhile.
Matt Tearle
on 18 Apr 2011
Hah. I just realized that, in my mind, a:dx:b goes "up to b", even if dx < 0. Stupid semantics.
Jan
on 15 Apr 2011
The famous Mr. Gauss could solve these calculations in some seconds without a computer. He imagined a table with the largest and smallest element sided by side, and the 2nd largest and 2nd smallest, etc. How many such pairs can you create? How large is the sum of these two elements? Are you able to ask Wikipedia how to use these information to creatre your answer with "basic arithmetic operators" only?
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