python

1. 判斷變量類型 使用isinstance

The Point

return is not a function. It is a control flow construct (like if else constructs). It is what lets you "take data with you between function calls".

Break down

print: gives the value to the user as an output string. print(3) would give a string '3' to the screen for the user to view. The program would lose the value. return: gives the value to the program. Callers of the function then have the actual data and data type (bool, int, etc...) return 3 would have the value 3 put in place of where the function was called. 參考