Difference Between Actual And Formal Parameters With Example In Python
Understanding Actual and Formal Parameters in Python with Examples
Difference Between Actual And Formal Parameters With Example In Python
In Python, actual parameters are the values or expressions passed to a function when it is called, while formal parameters are the placeholders or variables defined in the function signature that receive these values. Actual parameters are used to pass data into the function, which is then received and processed by the formal parameters within the function. For example, consider a function definition `add(a, b)` where `a` and `b` are formal parameters. When calling this function with `add(3, 5)`, 3 and 5 are the actual parameters passed to the function, and are assigned to `a` and `b` respectively as formal parameters within the function body for processing.
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1 - Actual parameters are the values that are passed to a function when it is called, while formal parameters are the placeholders defined in the function's signature to receive those values.
2) In Python, actual parameters are the arguments supplied in the function call, while formal parameters are the variables defined in the function header.
3) When a function is defined, the formal parameters act as placeholders that will hold the values passed as actual parameters when the function is called.
4) For example, let's consider a function that calculates the sum of two numbers:
```python
def add_numbers(num1, num2): # num1 and num2 are formal parameters
return num1 + num2
result = add_numbers(5, 7) # 5 and 7 are actual parameters
print(result) # Output: 12
```
5) In the above example, `num1` and `num2` are formal parameters that will hold the actual values 5 and 7 when the function is called with `add_numbers(5, 7)`.
6) The actual parameters 5 and 7 are passed to the function, where they are received by the formal parameters num1 and num2, and the sum of these values is returned.
7) Understanding the difference between actual and formal parameters is crucial when writing functions and calling them with the correct arguments.
8) Through practice and examples like the one above, students can grasp the concept of actual and formal parameters in Python programming effectively.
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