Compute $ \int\_{0}^{\pi} |$sin$(kx)| \,dx \quad (\forall k \in \mathbb{Z}$).

My question: Can I say $\int\_{0}^{\pi} |$sin$(kx)| \,dx = \int\_{0}^{\pi} $sin$(kx) \,dx$, because sin$(x)$ is positive on $[0;\pi]$?