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Possible Duplicate:
What does E mean in 9.0122222900391E-5?

if here e is Euler then it is 2.718... but it couldn't be ,the number being smaller every rows

    0.000227202114952789     0.000179517720456525     0.000141841161842193     0.000112072029109881     8.85507390497816e-05     6.99660160393339e-05     5.52817904508328e-05     4.36794393685600e-05     3.45121496245415e-05     2.72688589626009e-05     2.15457651062528e-05     1.70238144049402e-05     1.34509150853849e-05     1.06278835242547e-05     8.39734006854666e-06     6.63493536280223e-06     5.24241806443641e-06     4.14215748301150e-06     3.27281578904617e-06     2.58592852467836e-06     2.04320278493094e-06     1.61438244735281e-06     1.27556143988364e-06     1.00785101422911e-06     7.96326727292046e-07     6.29196426502324e-07     4.97142855508031e-07     3.92804231512548e-07     3.10363837244451e-07     2.45225747946181e-07 
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    $e-0.7 \approx -4.3\dots$2012-05-08

1 Answers 1

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In this case, the "$e$" in $2.45225747946181e-07$ indicates that the number coming immediately afterwards is the number of powers of $10$ that you would multiply $2.45225747946181$ by to get the number. So for example, $2.45225747946181e-07 = 2.45225747946181 \cdot 10^{-07} = 0.000000245225747946181$ $2.45225747946181e-05 = 2.45225747946181 \cdot 10^{-05} = 0.0000245225747946181$ $2.45225747946181e-01 = 2.45225747946181 \cdot 10^{-01} = 0.245225747946181$ $2.45225747946181e 03 = 2.45225747946181 \cdot 10^{3} = 2452.25747946181$ In this particular case, it has nothing to do with Euler's Constant. For more information, look at the Wikipedia article on Scientific Notation.

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    I suppose it would then mean $234234*10^6 = 234234000000$ This is scientific notation, though, so this would instead be written as $2.34234*10^{11}$2016-02-25