python for循环报错继续执行 python for循环 end

一、for 循环语法

循环字符串：
str = 'hello'
for x in str:
    print(x ,end=' ')# end="-" end="+"
#h e l l o    -----end=' ' 
#h-e-l-l-o    -----end="-"  
#h+e+l+l+o    -----end="+"

循环列表：
a = ["h","e","l","l","o"]
for x in a:
    print(x)

二、break 和 continue

for x in str:
    print(x)
    break
    print(123)

for x in str:
    print(x)
    continue
    print(123)

三、for...else...组合使用

for x  in  str:
   print(x)
else: #如果for正常循环完才执行else，如果遇到错误，break等，则不执行
   print("答应完成")

四、打印九九乘法表

for i in range(1,10):
    for j in range(1,i+1):
        print('%s*%s=%s' %(i,j,i*j),end=' ')
    print()