python - 为什么这段代码没有成功运行？

Question

这是简单的代码，但我无法运行!
我的代码是:

name = input("What is your name? ")
print("My name is "+name+". "+"My name length is " + len(str(name)))

和输出是:

What is your name? Ali
Traceback (most recent call last):
  File "c:\Users\iamAl\Desktop\Python\main.py", line 2, in <module> 
    print("My name is "+name+". "+"My name length is " + len(str(name)))
TypeError: can only concatenate str (not "int") to str

Answer 1

您需要转换从 len 返回的 int到 str , 不投 str至 str然后使用 len

print("My name is " + name + ". " + "My name length is " + str(len(name)))