Convert a For loop to While loop in python

Question

I am trying to convert these two for loops to while loops:

sum = 0
for i in range (10, 30):
    for j in range(i, 10*i):
               


        

Answer 1

What for i in range(a,b) does is it runs the loop for value of i starting from a till it reaches b-1 , same you can replecate with while loop statement. What we are doing here is before starting the loop we initiated i to be qual to a and then keep on increasing the value by order of 1 after each iteration.

And before starting next iteration if it's less that b if not we don't start the next iteration.

Watch this tutorial for more info.

sum = 0
i = 10
while i <30:
    j=i
    while j < (10*i):
        sum += j
        j+=1
    i+=1