PICO-8 Wiki
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sqrt( num )
Calculates the square root of a number.
num
The number. Must be positive.

The sqrt() function calculates the square root of a positive number.

When given a negative number, sqrt() returns a result, but it isn't useful.

Examples[]

print(sqrt(9))     -- 3

print(sqrt(0.25))  -- 0.5

See also[]

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