# Writ code to set $z$ to the sum of $x$ and $y$

#echo "The sum is $=$$$z$

# Now write code to show the value of $z,$ either by just typing $z,$ or by using "print" instead of "disp".

# Execute the cell. You should see something now.

# Now change the value of $x$ to $4$ as indicated.

# $x=4$

# Set $x$ to $x+1$

# $x=$ input $(x+1)$

# And check the value of $x$