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Answer:
Explanation:
Below is a little explanation to guide us through;
There are 4 nested methods : level 0, level 1, level 2, and level 3.
Before the methods, there's a global variable defined that can be accessed by all the methods.
Level 0:
This method uses global variable, creates a level 0 variable in its scope, this level 0 variable can be used by all underlying nested methods.
Level 1: this method uses global, level 0, and level 1 variable, which can be accessed by all underlying nested methods: level 2, level 3.
Level 2: similar to te previous ones, it also uses global, level 0, level 1 variables. And creates a level 2 variable that can be accessed by level 3 also.
Level 3:
This method uses all previously created variables, and creates a new level 3 variable.
Function calls:
As you can see, the function calls are part of the method scopes. So, in order to call level 3, we need to access level 2 (because it is getting called from level 2 scope), for level 2, we must call level 1, for which level 0 needs to be called.
So, level 0 is called, which gives its out put and calls level 1, which gives its own output and calls level 2 and so on till level 3 is also called.
CODE:
global_var = "global" #accessible to all functions
def level0():
level0_var = "level 0" #accessible to level 0,1,2,3
print();
print("Level 0 function:")
print("global variable: ",global_var)
print("local variable 0: ",level0_var)
def level1():
print();
print("Level 1 function:")
level1_var = "level 1" ##accessible to level 1,2,3
print("global variable: ",global_var)
print("local variable 0: ",level0_var)
print("local variable 1: ",level1_var)
def level2():
print();
print("Level 2 function:")
level2_var = "level 2" #accessible to level 2,3
print("global variable: ",global_var)
print("local variable 0: ",level0_var)
print("local variable 1: ",level1_var)
print("local variable 2: ",level2_var)
def level3():
print();
print("Level 3 function:")
level3_var = "level 3" #accessible to level 3
print("global variable: ",global_var)
print("local variable 0: ",level0_var)
print("local variable 1: ",level1_var)
print("local variable 2: ",level2_var)
print("local variable 3: ",level3_var)
level3()
level2()
level1()
level0()
attached is the result of the code, also take note of the indentations too
cheers i hope this helps!!!!!
