====== for range enumerate 文 ======

===== range 関数による繰り返し =====
<code python>
In : range(5)
Out: [0, 1, 2, 3, 4]

for index in range(5):
    print('index: {0}'.format(index))

index: 0
index: 1
index: 2
index: 3
index: 4
</code>
===== enumerate 関数によるリストの繰り返し =====

<code python>
In : colors = ['red', 'blue', 'green', 'pink', 'white']

for index, color in enumerate(colors):
    print('color{0}: {1}'.format(index, color))

color0: red
color1: blue
color2: green
color3: pink
color4: white
</code>

===== continue と break =====
一定の条件で処理をスキップ
<code python>
for index in range(10):
    if index >= 2 and index <= 7:
        continue
    print('index: {0}'.format(index))

index: 0
index: 1
index: 8
index: 9
</code>
一定の条件で処理を中止
<code python>
for index in range(10):
    if index >= 4:
        break
    print('index: {0}'.format(index))
     
index: 0
index: 1
index: 2
index: 3
</code>