log function

Input type Output type
float
complex 		float
complex

This function calculates the natural logarithm of the argument and returns the result. If the argument is of type int, it is first converted to float by the compiler.

Examples: 

  log(4)      ; 1.3863  log(4.0)    ; 1.3863  log((4,0))  ; (1.3863,0)

Notes

  • log(exp(x)) is equal to x if x is larger than zero (for float arguments) or not equal to zero (for complex arguments).
  • For float arguments, log(x) takes the absolute value of x, so it is actually equal to log(abs(x)). Log(0) returns 0.
  • The natural logarithm is the logarithm with base e (approx. 2.7183). To calculate the logarithm with base b, use the following formula:
    b    log x = log(x) / log(b).

See Also
exp function

log function