print ("hello world")

print ('hello world')

print ('''This is the first line
        This is the second line
        This is the last line''')
age =3
name = "Tom"
# 总体numerics
# numerics ,int ,flost.complex   (z.)
# print ("{0} was {1} years old".format(name,age))
print (name + " was " + str(age) + " years old")
# 字面常量，直接以字面的意义使用
# 变量 储存信息，属于
# 第一个字符必须是字母或下划线，区分大小写
