# [−][src]Function num::traits::pow::checked_pow

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

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

Note that `0⁰` (`checked_pow(0, 0)`) returnes `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

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