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44 lines
1.6 KiB
Markdown
44 lines
1.6 KiB
Markdown
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The [^](^) operation raises a numerical value to an exponential value expressing how many times the value is multiplied by itself.
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## Syntax
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> return_value = number [^](^) {whole_exponent|(fractional_exponent)}
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## Description
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* The number value can be any type literal or variable numerical value.
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* Exponents can be any positive or negative integer or fractional numerical value inside of parenthesis brackets.
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* If the exponent is zero, the value returned is 1.
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* Fractional(or decimal point) exponents MUST be enclosed in **() brackets** and will return the fractional exponential root of a value.
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* Exponential operations are done first in the QBasic order of operations.
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* The square root of a number can be returned by the [SQR](SQR) function or by using an exponent of (1 [/](/) 2). Brackets required.
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* Values returned may be expressed using exponential or [Scientific notation](Scientific-notation) using **E** for SINGLE or **D** for DOUBLE precision.
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* WARNING: Exponential returns may exceed numerical type limitations and create an [ERROR Codes](ERROR-Codes)!
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## Example(s)
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Getting the cube root of a number.
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```vb
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INPUT "Enter a number to calculate it's cube root: ", num$
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number! = VAL(num$) 'gets single number value
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cuberoot# = number! ^ (1 / 3)
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PRINT cuberoot# 'double type variable for accuracy
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```
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*Details:* The value returned will most likely be a [SINGLE](SINGLE) or [DOUBLE](DOUBLE) value. Make sure that the return variable type matches the likely program operations!
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```text
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Enter a number to calculate it's cube root: 144
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5.241482788417793
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```
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## See Also
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* [SQR](SQR), [Mathematical Operations](Mathematical-Operations)
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