Runtime Error i didn't know khat it mean

Who can tell me what happen, i don’t see this before

Are you trying to take the square root of negative number in any way?

Show us the blocks

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I don’t use negative number ,I just use random number of number blocks

Can you set the language to English? :sweat_smile:
I can’t read what blocks are

Sorry about that, but my problem have solved.I think it is because i use too much cycle,when i delete one , it didn’t show again. Thanks all::grinning:

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