How to graph $|x|+|y|\le1$?

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What should be the approach to draw the graph of the above inequality with modulus? Should I need to begin like this? $$|y| = 1 - |x|$$

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It is: $$ \begin{cases} y\ge 0\\ y\le1-|x| \end{cases} \quad \land \quad \begin{cases} y< 0\\ y\ge|x|-1 \end{cases} $$ so it is a square with vertices: $(1,0)$,$(0,1)$,$(-1,0)$,$(0,-1)$