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The value of the result is an approximation to the natural logarithm (base e) of X.
Like many intrinsic functions, this is elemental; the result has the same shape as X, with the operation being applied elementwise.
If X is of type Real, it must be greater than zero.
If X is of type Complex, it must not be equal to zero, and the result is the principal value with the imaginary part in the range −π ≤ AIMAG(LOG(X)) ≤ +π.
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