python之输出方式

打印下面字符串的3种方式

给变量 赋值：

name = "Zhengzi"
age = 26

1.连接符+拼接

print("name is : " + name + ",age is :" + str(age))  # + 连接字符串，age为整型，不能直接连接，需要转换

2.格式符替换

print("name is: %s ,age is: %d" % (name, age))  # %s,%d分别替换指定字符串，指定数字,不确定打印类型用%r替换

3.格式化format()

print("name is :{}, age is :{}".format(name, age))  # format()格式化,默认顺序
# 用{0},{1}指定位置
print("name is :{1}, age is :{0}".format(age, name))
# 用变量指定对应的关系
print("name is :{n}, age is :{a}".format(a=age, n=name))