# Scientific notation

Revision as of 16:09, 11 November 2010 by imported>Clippy (Created page with ''''Scientific notation''' or exponential notation is used to express very large or small numerical values by SINGLE or DOUBLE accuracy. ''Usage:'' -9.7587E+04 or …')

**Scientific notation** or exponential notation is used to express very large or small numerical values by SINGLE or DOUBLE accuracy.

*Usage:* -9.7587E+04 or 4.6545D-9

**E**denotes SINGLE precision accuracy and**D**denotes DOUBLE precision accuracy in Qbasic.- To translate the notation, multiply the number preceding the letter by the value of 10 raised to the power following the letter.
**Note:**Naturally calculating the value in Qbasic would return the same value expression!

*Example 1:* +2.184D+3 means to multiply 2.184 by 1,000 (1,000 is 10 raised to the third power, or 10 ^ 3 ).

- To multiply by 10 raised to a positive power, just move the decimal point to the right by the power number.
- The result is 2184 in DOUBLE accuracy.

*Example 2:* -5.412D-2 is negative 5.412 times .01 (10 raised to the -2 power or 10 ^ -2 ).

- To multiply a number by 10 raised to a negative power, just move the decimal point to the left by the number of the power.
- The result is -.05412 in DOUBLE accuracy.

*Example 3:* 3.07E+12 is a positive 3.07 times 1,000,000,000,000 (10 raised to the 12 power or 10 ^ 12).

- To multiply a number by 10 raised to a positive power, just move the decimal point to the left by 12.
- The result is 3,070,000,000,000 in SINGLE accuracy.

*See also:*

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