1. 字符串的拼接 print(var_1 + var_2)  

print("supercarry" + "doinb")
name = "doinb"
sex = "man"
score = "100"
print("sex:" + sex + " name:" + name + " score:" + score)

        注意：+ 只适用于字符变量和字面量的拼接，不能将整数、浮点数和字符串混在一起，否则会报错

2. 通过占位符实现各种变量的拼接

        “%占位符” % 变量

（1）%d 整数占位符

（2）%f 浮点数占位符

（3）%s 字符串占位符

name = "doinb"
print("this is supercarry%s" % name)
print("%s is Champion , this is supercarry%s" % (name, name))

score_1 = 100
score_2 = 60
print("the score of doinb is %s" % score_1)
print("the score of doinb is %d     the score of lwx is %d" % (score_1, score_2))

salary_1 = 6666.66
salary_2 = 100000000
print("the salary of doinb is %f" % salary_1)
print("the score of doinb is %f     the score of lwx is %f" % (salary_1, salary_2))

print("%s is Champion, the score of %s is %d, the salary of %s is %f" % (name, name, score_1, name, salary_2))

注意：整数、浮点数可通过%s转化为字符串