Global variables and local variables for functions in Python

1. What is a local variable

A local variable is a variable that has a local effect and is defined inside a function. The scope is only within the function, the variables outside the function is not affected, that is, the same name function, if not in the function to do the global Declaration

Then there's no effect on the outside of the function.

1x ="Alex"2 3 deffunc (x):4     Print('the value of x is', X)5x = "A"6     Print('local variable x is changed to', X)7 8 func (x)9 Print('the value of x does not change and remains', X)Ten  One  A #The output is as follows - the value of X is Alex. - local variable x changed to a theThe value of x has not changed, still Alex.

2, what is the global variable, is the scope of coverage to the global, if the function inside the global declaration, then you can change the value of the global variable inside the function

1x ="Alex"2 3 deffunc ():4     Globalx5     Print('the value of the global variable x is', X)6x ="a"7     Print('global variable x is changed to', X)8 9 func ()Ten Print('the value of x now is', X) One  A #Output - the value of global variable x is Alex - global variable x changed to a theX Now the value is a

Global variables and local variables for functions in Python