def square$($n$)$:

# handle negative input

if $($n $<0)$:

n $=-$n

# Initialize result

res $=$ n

# Add n to res n$-1$ times

for i in range$(1,$ n$)$:

res $+=$ n

return res

# Driver Code

for n in range$(1,6)$:

print$("$n $=",$ n$,$ end$=",")$

print$("$n$^2=",$ square$($n$))$

Can you explain the res part