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Asked by Praveen Last Modified
Answer 
Michael Devine
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There may be a typo in the question. however this could be the corrected question.....
for (I=0, j=n; I<n; I++, j--)
>>> # for (I=0, j=n; I<n; I++, j--)
>>> j=n=10 # we initialize 'n' and 'j'
>>> # i<10 is the terminating condition, so we loop 'n' times.
>>> for i in range(n):
#in your case you are incrementing i by 1 repeatedly
#and in the end i==n. j will be decremented by 1, n times.
#In Python, we simulate the 'for' loop with range() and the the Range object will have a
#sequence of int objects from 0 to 9. (ie.n-1). The 'for' construct will iterate thru the
#Range object according to its size and stop,after which it will execute the 'else' block.
#In Python, 'else' is an independent construct that can be used when ever a condition is checked.
#'else' will execute when a condition is 'False'. We initialize 'n' and 'j' outside the 'for' construct.
#The range() will construct a Range object of ints from 0 to n. All we need to do is decrement j.
#On successful completion of the 'for', the 'else' will execute. Here, we add 1 to 'i' to make i==n.
j-=1
else:
i+=1
print('i= ',i,'\n','j= ',j)
i= 10
j= 0
>>>
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