python-for循环

循环示例一：

count = 10
for i in range(10):
    print(i)
else:
    print('nothing')

for循环示例二：

color = ['red','orange','yellow','green','cyan']
for i in range(len(color)):
    print(color[i])

for循环示例三：步长 2

for i in range(0,10,2):
    print(i)

for循环示例四：输出每个字母

for i in 'hello':
    print(i)

for循环示例五：遍历数组

color = ['color','orange','yellow','green']
for i in color:
    print(i)

 简单求和示例：

sum = 0
for i in range(100):
    i+=1
    sum += i
print(sum)