About all variables and local variables scopes

1  def FF (): 2      A=13      sum=a+b4      print(sum)5  b=16   print(b)7  ff ()8  print('  outside the function B', b)

This code will work as expected. Because B is defined outside the function, it is a global variable. Sum=a+b Direct reference to the value of B

1 b=12def  ff ():3     b+=14     print(b) 5 6 Print (b) 7 FF () 8 Print (' B ' outside the function, b)

This code will error. Because the variable b inside the function is a new variable relative to the outside of the function, just the name is exactly the same. and the B in the function is quoted without first assigning a value, so it will be an error.

About all variables and local variables scopes