In [1]:

    

l1 = [1, 2, 3]
l2 = [10, 20, 30]


    

In [2]:

    

for i in l1:
    for j in l2:
        print(i, j)


    

    




1 10
1 20
1 30
2 10
2 20
2 30
3 10
3 20
3 30

In [3]:

    

for i in l1:
    for j in l2:
        print(i, j)
        if i == 2 and j == 20 :
            print('BREAK')
            break


    

    




1 10
1 20
1 30
2 10
2 20
BREAK
3 10
3 20
3 30

In [4]:

    

for i in l1:
    for j in l2:
        print(i, j)
        if i == 2 and j == 20:
            print('BREAK')
            break
    else:
        continue
    break


    

    




1 10
1 20
1 30
2 10
2 20
BREAK

In [5]:

    

for i in l1:
    print('Start outer loop')

    for j in l2:
        print('--', i, j)
        if i == 2 and j == 20:
            print('-- BREAK inner loop')
            break
    else:
        print('-- Finish inner loop without BREAK')
        continue

    print('BREAK outer loop')
    break


    

    




Start outer loop
-- 1 10
-- 1 20
-- 1 30
-- Finish inner loop without BREAK
Start outer loop
-- 2 10
-- 2 20
-- BREAK inner loop
BREAK outer loop

In [6]:

    

l1 = [1, 2, 3]
l2 = [10, 20, 30]
l3 = [100, 200, 300]

for i in l1:
    for j in l2:
        for k in l3:
            print(i, j, k)
            if i == 2 and j == 20 and k == 200:
                print('BREAK')
                break
        else:
            continue
        break
    else:
        continue
    break


    

    




1 10 100
1 10 200
1 10 300
1 20 100
1 20 200
1 20 300
1 30 100
1 30 200
1 30 300
2 10 100
2 10 200
2 10 300
2 20 100
2 20 200
BREAK

In [7]:

    

l1 = [1, 2, 3]
l2 = [10, 20, 30]

flag = False
for i in l1:
    for j in l2:
        print(i, j)
        if i == 2 and j == 20:
            flag = True
            print('BREAK')
            break
    if flag:
        break


    

    




1 10
1 20
1 30
2 10
2 20
BREAK

In [8]:

    

l1 = [1, 2, 3]
l2 = [10, 20, 30]
l3 = [100, 200, 300]

flag = False
for i in l1:
    for j in l2:
        for k in l3:
            print(i, j, k)
            if i == 2 and j == 20 and k == 200:
                flag = True
                print('BREAK')
                break
        if flag:
            break
    if flag:
        break


    

    




1 10 100
1 10 200
1 10 300
1 20 100
1 20 200
1 20 300
1 30 100
1 30 200
1 30 300
2 10 100
2 10 200
2 10 300
2 20 100
2 20 200
BREAK