(n)
return result
Returns the nth value in the Fibonacci sequence.
Returns the nth value in the Fibonacci sequence.
Returns the nth value in the Fibonacci sequence .
def fib(n):
    """Returns the nth value in the Fibonacci sequence.
    """

    if n <= 2:
        return n
    if n in _fib_cache:
        return _fib_cache[n]
    result = fib(n - 1) + fib(n - 2)
    _fib_cache[n] = result
    return result
def fib ( n ) : if n <= 2 : return n if n in _fib_cache : return _fib_cache [ n ] result = fib ( n - 1 ) + fib ( n - 2 ) _fib_cache [ n ] = result return result