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#
# print sum of input numbers
#
ld zero # initialize sum to zero
st sum
loop get # read a number
jz done # no more input if number is zero
add sum # add in accumulated sum
st sum # store new value back in sum
j loop # go back and read another number
done ld sum
put # print sum
halt # stop program execution
zero const 0 # constant
sum const # variable
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