doubt

Question

iteration = 0
count = 0
while iteration < 5:
# the variable 'letter' in the loop stands for every
# character, including spaces and commas!
for letter in "hello, world":
count += 1
print("Iteration " + str(iteration) + "; count is: " + str(count))
iteration += 1
what does for letter in "hello, world" mean and what does it do ?

Answer 1

The string "hello, world" will be assigned to the variable letter in a loop, letter by letter

1: letter = h
2: letter = e
3: letter = l

and so on. It will be repeated 5 times and the variable count will count the total number of operations. So 12 letters in the string *5 = 60. Whitespace is a letter as well.