Function arguments in Python, you can define a function by using the def keyword followed by the function name and a set of parentheses (). Inside the parentheses, you can specify one or more parameters that the function takes as input. For example:
def greet(name):
print("Hello, " + name + "!")
greet("Alice")The function greet() takes a single parameter called name. When you call the function with an argument, such as greet(“Alice”), the value of the argument is passed to the function and is used as the value of the parameter. The function then prints out a greeting using the value of the name parameter.
You can also specify default values for function parameters by including an equal sign = and a default value in the parameter list. For example:
def greet(name, greeting="Hello"):
print(greeting + ", " + name + "!")
greet("Alice")
greet("Bob", "Hi")In this example, the greet() function has a second parameter called greeting with a default value of “Hello”. When you call the function with a single argument, as in greet(“Alice”), the default value of “Hello” is used for the greeting parameter. When you call the function with two arguments, as in greet(“Bob”, “Hi”), the second argument is used as the value of the greeting parameter.
You can also use the * operator to specify that a function takes an arbitrary number of arguments. These arguments are collected into a tuple and can be accessed inside the function using the * operator. For example:
def sum_numbers(*numbers):
total = 0
for number in numbers:
total += number
return total
print(sum_numbers(1, 2, 3))
print(sum_numbers(1, 2, 3, 4, 5))The sum_numbers() function takes an arbitrary number of arguments and adds them together. When you call the function with multiple arguments, such as sum_numbers(1, 2, 3), the arguments are collected into a tuple and passed to the function as the value of the numbers parameter.
You can also use the ** operator to specify that a function takes an arbitrary number of keyword arguments. These arguments are collected into a dictionary and can be accessed inside the function using the ** operator. For example:
def print_kwargs(**kwargs):
for key, value in kwargs.items():
print(key + ": " + value)
print_kwargs(name="Alice", age=25)
print_kwargs(city="New York", country="USA")The print_kwargs() function takes an arbitrary number of keyword arguments and prints them out. When you call the function with multiple keyword arguments, such as print_kwargs(name=”Alice”, age=25), the arguments are collected into a dictionary and passed to the function as the value of the kwargs parameter.
For more information please visit python.org
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