Question

Write a rule for the sign function s(n): s(n) is -1 when n is negative and, +1 when n is positive, and 0 otherwise

Answer 1

\( s(n)=\left\{
\begin{array}{ll}
-1 & n< 0 \\
0 & n=0 \\
1 &n>0 \\
\end{array}
\right. \)

Answer 2

Oh! That makes so much sense, thank you so much! @zzr0ck3r