i = 0
while i <= 10 :
    print(i)
    i = i+1

donne :

>>>
0
1
2
3
4
5
6
7
8
9
10>>>

s = "Hello world"

for lettre in s :
    print(lettre)

donne :

>>>
H
e
l
l
o

w
o
r
l
d>>>

for i in range(0,10) :
    print(i)

donne

>>>
0
1
2
3
4
5
6
7
8
9>>>

for i in range(0,10) :
    print(i)
    if i == 5 :
        break

donne :

>>>
0
1
2
3
4
5>>>