For Loop

numbers = [1, 2, 3, 4]

for number in numbers:
    # do something
    pass

# nested
for i in range(10):
    for j in range(10):
        # do something
        pass

# iterating dictionaries
dict = { 'Alpha': 1, 'Beta': 2 }

for key in dict.keys(): print(key)
# Alpha
# Beta

for value in dict.values(): print(value)
# 1
# 2

for key, value in dict.items(): print(key, value)
# Alpha 1
# Beta 2