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What will be the output of the following code?
x = 5
def change_x():
global x
x = 10
global x
x = 10
change_x()
print(x)
print(x)
- a)5
- b)10
- c)Error: undefined variable x
- d)Error: cannot use global keyword inside a function
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
What will be the output of the following code?x = 5def change_x():glob...
The correct answer is option 'B': 10.
Explanation:
The code provided defines a global variable `x` with a value of 5. It then defines a function called `change_x()` that changes the value of the global variable `x` to 10 using the `global` keyword. Finally, it calls the `change_x()` function and prints the value of `x`.
Here is a step-by-step breakdown of the code execution:
1. The variable `x` is assigned the value 5.
2. The function `change_x()` is defined. Inside the function, the `global` keyword is used to indicate that the variable `x` is a global variable (rather than a local variable specific to the function).
3. Inside the `change_x()` function, the value of `x` is changed to 10.
4. The `change_x()` function is called, which updates the value of the global variable `x` to 10.
5. The `print(x)` statement is executed, which outputs the value of `x`, which is now 10.
Therefore, the output of the code will be 10.
Key points:
- The `global` keyword is used to indicate that a variable is a global variable, allowing it to be accessed and modified from both inside and outside of functions.
- When a variable is defined as global inside a function, any changes made to the variable inside the function will affect its value outside of the function as well.
- In this case, by using the `global` keyword inside the `change_x()` function, the value of the variable `x` is modified from 5 to 10, and this updated value is printed outside of the function.
Explanation:
The code provided defines a global variable `x` with a value of 5. It then defines a function called `change_x()` that changes the value of the global variable `x` to 10 using the `global` keyword. Finally, it calls the `change_x()` function and prints the value of `x`.
Here is a step-by-step breakdown of the code execution:
1. The variable `x` is assigned the value 5.
2. The function `change_x()` is defined. Inside the function, the `global` keyword is used to indicate that the variable `x` is a global variable (rather than a local variable specific to the function).
3. Inside the `change_x()` function, the value of `x` is changed to 10.
4. The `change_x()` function is called, which updates the value of the global variable `x` to 10.
5. The `print(x)` statement is executed, which outputs the value of `x`, which is now 10.
Therefore, the output of the code will be 10.
Key points:
- The `global` keyword is used to indicate that a variable is a global variable, allowing it to be accessed and modified from both inside and outside of functions.
- When a variable is defined as global inside a function, any changes made to the variable inside the function will affect its value outside of the function as well.
- In this case, by using the `global` keyword inside the `change_x()` function, the value of the variable `x` is modified from 5 to 10, and this updated value is printed outside of the function.
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Community Answer
What will be the output of the following code?x = 5def change_x():glob...
The function change_x modifies the value of the global variable x using the global keyword. When the function is called, the value of x is changed to 10. Therefore, the output is 10.
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