sqrt

The sqrt function returns the square root function.

Syntax

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    sqrt( X )

Arguments

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• X: A real number >= 0.

Returns

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• A positive number such that sqrt(x) * sqrt(x) == x.
• null if the argument is negative or cannot be converted to a real value.

Examples

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This returns 4:

print sqrt ( 16 )

This returns null:

print sqrt ( -64 )