Explain the dry run of else statement

#1

I have a doubt how the even row is getting printed.
In the else statement, the true expression of while is (col<=row-2) how will it print 1001 if row=4

#2

Hey @Tanvi-Varshney-250726472940778,

  1. As you have noticed a common pattern in the even rows:
    i.e. first and the last col is 1 as rest all the values are 0.

  2. The number of values or column per row is equal to the row number.
    i,e row 1: 1 element
    row 2: 2 element
    so on…

So, if row is even:

  1. print 1 for col 0
  2. (col<=row-2)
    This means:
    for col 1 to row-2 i.e. the second last column print 0
  3. print 1 for row-1 col i.e. the last col.

Hope, this would help.

2 Likes
#3

@S18ML0016
thanks bhaiya for ur awesome reply

#4

Thnku bhaiya to resolve my doubt

#5

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