This function returns the log base 2 of n

log2(n)

Returns: double

The function asks: "How many times does the number 2 have to be multiplied by itself to equal n?" For example, function log2(4) will return 2, because 2x2 = 4. There are 2 powers of 2 to equal 4.

double value;
value = log2(16);

This code will set value to 4, beacuse 2x2x2x2 = 16. There are 4 powers of 2 to equal 16.

double value;
value = log2(5);

This code will set value to 2.321929.

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