a = int(raw_input("请输入一个整数"))
print("你输入的是:"+str(a))
如果a想要拼接,但是不进行类型转换那么是如下错误:
raceback (most recent call last):
File "/Users/aaa/PycharmProjects/myphton/demo.py", line 12, in <module>
print("你输入的是:"+a)
TypeError: cannot concatenate 'str' and 'int' objects
Process finished with exit code 1
