log [function]

log( x, y )

returns the base-`y` logarithm of x, as real

• If x <= 0 or b <= 0 or b = 1, function returns null and emits a warning message.

log( 9, 3 ); // real (2)
log( -1, 3 ); // .. or ..
log( 3, 0 ); // .. or ..
log( 3, 1 ); // null; Warning: log(): mathematical error