[python] multiplication in for loop

Question

My code is like this:
for i in range(10):
print(i*0.1)
And output is:
0.0
0.1
0.2
0.30000000000000004
0.4
0.5
0.6000000000000001
0.7000000000000001
0.8
0.9

why output is not 0.1, 0.2, 0.3, 0.4......??

Answer 1

you can round it to one decimal

for i in range(10):
a = i*0.1
print("%.1f" % a)