# please explain me the working of 3rd line in the code, cant we use "b=len(a))"

Question

a=["vim","#?","skk","jsj"]
b=len(a)-1
c=0
while c<=b:
d=a[c]
print(d)
c=c+1

https://code.sololearn.com/cpwKJRvWI3LQ/?ref=app

Answer 1

No we can't. This is because array indices start from 0
So
a[0] = "vim", a[1] = "#?", a[2] = "skk" and a[3] = "jsj"

As you can see, the last index is 3. So if we take b = len(c), b will be 4 and a[4] does not exist.

So we have to take
b = len(c) - 1

Answer 2

I suppose that your code should read the elements of list "a" and output them. Just for your information, there is a very pythonic way to do this task with a for loop. By using a for loop, you don't need to know the length of the list. This can do similar output as your code:

a=["vim","#?","skk","jsj"]
for element in a:
print(element)

"element" is a regular variable that gets exactly one element from the list per each iteration. So at the end the of iteration of the for loop, all elements are printed.

Answer 3

Tham you sir

Answer 4

Thank you sir