int_sum = add(1,2)3
int_sum = add(1,2,3) 6
0.0+1.0=1.0
0.0+1.1=1.1
0.0+1.2000000000000002=1.2000000000000002
0.0+1.3000000000000003=1.3000000000000003
0.0+1.4000000000000004=1.4000000000000004
0.0+1.5000000000000004=1.5000000000000004
0.0+1.6000000000000005=1.6000000000000005
0.0+1.7000000000000006=1.7000000000000006
0.0+1.8000000000000007=1.8000000000000007
0.0+1.9000000000000008=1.9000000000000008
0.0+2.000000000000001=2.000000000000001
0.0+2.100000000000001=2.100000000000001
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