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Understanding Scientific Output 
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#1
Mar1512, 06:09 AM

P: 4

I've been using a calculator and did end up with the answer in the form of 5.34588e012 or something like that.
I was learning Matlabs where I did sin(pi)=1.2246e016 I'm not into how did sin(pi) go equal to 1.2246e016 but what does 1.2246e016 mean ? I googled it and someplace it wrote 1e1=10 3e3=3000 Does this mean e3=10^3, 3e3=3*10^3 ? 


#2
Mar1512, 08:17 AM

P: 25

You're spot on. In this scenario (as with many calculators) e simply means 'exponent' or 'times ten to the power of'. It's often shortened (as in Excel) to just XeY meaning 'X times ten to the power of Y'
1.2246e016 means 1.2246x10^16 Sure saves writing out 0.00000000000000012246 :) Don't be mixed up with e being the base of the natural logarithm (2.71828, it's an irrational constant, like Pi). I don't know what level of maths you're at, so if you haven't heard of e being used in this context, it's probably not something you need to worry about. If you know all about it already, ignore this. 


#3
Mar1512, 08:47 AM

P: 4

Yes I've the idea of ln and log along with exponential e^x or 10^x. So at first I too thought XeY= X*e^Y rather than X*10^Y.
But I guess it's all clear now :) Thanks Mate 


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