The code snippet defines a function foo with three parameters: a, b, and c. The parameters b and c have default values of 5 and 10, respectively. Here's a detailed explanation of the function and its usage:
Function Definition
def foo(a, b=5, c=10):
return a + b + c
a: This is a required positional parameter. It does not have a default value, so it must be provided when the function is called.
b: This parameter has a default value of 5. If the caller does not provide a value for b, it will default to 5.
c: This parameter has a default value of 10. If the caller does not provide a value for c, it will default to 10.
The function foo returns the sum of a, b, and c.
Function Call
print(foo(1, 2))
When the function foo is called with the arguments 1 and 2:
a is assigned the value 1 (from the first argument).
b is assigned the value 2 (from the second argument).
c is not provided, so it uses its default value of 10.
Thus, the function calculates the sum as follows:
a + b + c
1 + 2 + 10
13
Output
The print function outputs the result of the function call:
print(foo(1, 2)) # Output: 13
Summary
The foo function calculates the sum of its three parameters, using default values for b and c if they are not provided. In this specific call, foo(1, 2), it returns 13 because 1 + 2 + 10 equals 13.
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