What kind of use [for], [while] in Python?

Question

I don't understand well.

Answer 1

See 'for' and 'while' are loops in Python.
Loops executes the block of code until a condition is satisfied. When the condition becomes false, the statement immediately after the loop is executed.
The statements inside them are repeatedly executed, as long as the condition holds.

Answer 2

'for' iterates (goes through one thing at a time) over a sequence like a list or a string or a range of numbers, and makes the loop execute each time.

'while' makes the loop execute as long as the condition is True.

e.g.

for x in "abc":
print(x)

outputs:
a
b
c

i = 0
while i < 3:
print("abc"[i])
i = i + 1

outputs:
a
b
c

Answer 3

for is count controlled whereas while is condition controlled.