# Function num_traits::pow::checked_pow [−] [src]

    pub fn checked_pow<T: Clone + One + CheckedMul>(
        base: T,
        exp: usize
    ) -> Option<T>

Raises a value to the power of exp, returning `None` if an overflow occurred.

Note that `0⁰` (`checked_pow(0, 0)`) returns `Some(1)`. Mathematically this is undefined.

Otherwise same as the `pow` function.

# Example

    use num_traits::checked_pow;

    assert_eq!(checked_pow(2i8, 4), Some(16));
    assert_eq!(checked_pow(7i8, 8), None);
    assert_eq!(checked_pow(7u32, 8), Some(5_764_801));
    assert_eq!(checked_pow(0u32, 0), Some(1)); // Be aware if this case affect you