a = 1000
count = 0
while count != 15:
count = count + 1
a = a * 0.1
print('====\n#', count)
print('a =', a)
____
Result:
====
# 1
a = 100.0
====
# 2
a = 10.0
====
# 3
a = 1.0
====
# 4
a = 0.1
====
# 5
a = 0.010000000000000002
====
# 6
a = 0.0010000000000000002
====
# 7
a = 0.00010000000000000003
====
# 8
a = 1.0000000000000004e-05
etc
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