# Calculating the degree of the lowest non-zero term of a polynomial

I was wondering if there was a way to calculate the degree of the lowest non-zero term of a polynomial. What I mean by this is that, for example, for `x^2+7x^4+x^5`

, I would like to return `2`

, for `7x+x^2+7x^4+x^5`

I would like to return `1`

, for `1+7x+x^2+7x^4+x^5`

I would like to return `0`

, ect...