Python3基础语法 从入门到精通三

# Python3 break continue pass 语句区别
for str in 'Python':     # break Example
if str == 'h':
break
print ('Current str :',str);

print("break demo is end");

for str in 'Python':     # continue Example
if str == 'h':
continue
print ('Current str :',str);

print("continue demo is end");

for str in 'Python':      # pass Example
if str == 'h':
pass
print("Current str :",str)
print("pass demo is end");

#Python 字符函数
s = "HelloWorld";
print("转换 s 中的小写字母为大写:",s.upper());
print("返回长度为 width 的字符串，原字符串 string 右对齐，前面填充:",s.zfill(12));