Scientific notation is a way to write numbers that are too large or too small. For example, a microbiologist might need to measure cell growth up to 0.000000005 of a micron.
Use scientific notation to write the number 56,372.85 as 5.637285´10^{4 }(where 10^{4} is 10000; the decimal goes to the right four spots). In most programming languages, you can use E-notation to represent decimal numbers.
In E-notation, the number 56,372.85 is written as 5.637285E4. The part of the number after the E is the power of 10. The E4 in this example means “times ten to the fourth power.” The Table shows you the E representation of some numbers.
Table: Examples of E-notation
Number |
E-Notation |
3563.21 |
3.56321E+03 |
0.000356 |
3.56E-04 |
56,000,000 |
5.6 E+07 |
Small Basic doesn’t treat E-notations like other numbers; you can’t assign an E-notation to a variable. For example, this statement gives you a syntax error:
x = 1.2E+02 ' This gives you a syntax error. You're welcome.
But if you put the E-notation in double quotes, then Small Basic recognizes it as a number! This is a parser feature to make it clear (to you and to Small Basic) that you meant it to be an E-notation. Try out this code snippet to get a hang of it:
x = "1.2E+02" '= 120
y = "5.0E-02" '= 0.05
z = "1.0E+03" '= 1000
TextWindow.WriteLine(x + x) 'Answer = 240
TextWindow.WriteLine(x * y) 'Answer = 6.000
TextWindow.WriteLine(x / y) 'Answer = 2400
TextWindow.WriteLine(z - x) 'Answer = 880
Now you can use E-notation when you need to!
Head to http://blogs.msdn.com/SmallBasic to download it and learn all about it!
Small and Basically yours,
- Ninja Ed & Majed Marji
Thank you for your information. I didn't know about Exponential Notation for Small Basic!
Nonki, well there you go! I did my good deed for the year! =^)
TNWiki version: social.technet.microsoft.com/…/31986.small-basic-scientific-notation.aspx
And the blog post over on the Small Basic blog: blogs.msdn.com/…/small-basic-includes-exponential-notation.aspx
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