Error when trying to square a number

[pistacheoowalnuttanker]

Hello, I am completely new to Python and I was following a tutorial on Python 3 using Jupyiter notebook when I got the error bellow ***
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TypeError                                 Traceback (most recent call last) <ipython-input-39-8ab96e18e533> in <module>()       3 weight_kg = "155"       4 ----> 5 bmi = weight_kg / (height_m ** 2)       6 print("bmi: ")       7 print(bmi)

TypeError: unsupported operand type(s) for ** or pow(): 'str' and 'int'

I have exactly what is in the video and it worked for him, I can't find the reason it is giving me this error. I have tried clearing the kernal, restarting Jupyiter, trying to isolate the problem like seen below
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1 2	height_m = "2" bmi = (height_m ** 2)

It comes up with the same error, what is the problem with this line of code? Thanks, Mike.

[Larz60+]

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>>> weight_kg = "155" >>> type (weight_kg) <class 'str'> >>> weight_kg = 155 >>> type (weight_kg) <class 'int'> >>>

you cannot multiply strings

[pistacheoowalnuttanker]

Could you check out this video" https://youtu.be/AWek49wXGzI?t=18m5s the link should bring you to the part where he actually seems to multiply strings, but the time is 18:05 if it doesn't work. Does he do it differently than me? I don't see any reason why his would work and mine wouldn't.

[Larz60+]

Without looking at the video:
You cannot multiply a string. You need to use integers. This is what I show in the previous post

[pistacheoowalnuttanker]

I understand that you cannot multiply strings, but that's why I gave you the link to the video. CS Dojo is the Youtuber who (at 18:05 in the video) shows that he can multiply a string with an integer like shown in the code below.

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weight_kg = "50" height_m = "2" bmi = weight_kg / (height_m ** 2)

[pistacheoowalnuttanker]

My bad I didn't understand that you were refering to the weight and height, thanks for explaining. That fixed my problem. Sorry again!