For j in range(1,10,-1):

Python range in intervals of 10

print("using start, stop, and step arguments in Python range() function")
print("Printing All odd numbers between 1 and 10 using range()")
for i in range(1, 10, 2):
    print(i, end=', ')

Source: pynative.com

For j in range(1,10,-1):

for i in range(20,1,-2): 
print(i, end=' ')

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