Functions are a way to encapsulate code and reuse it throughout your program. In Python, you can define a function using the def keyword, and call a function using the function name followed by parentheses and any required arguments.
Here’s an example of how to write and call a function in Python:
# Define a function
def greet(name):
print("Hello, " + name + "!")
# Call the function
greet("Alice")
how to call a function in python with the greet function
In this example, we defined a function called greet that takes one argument, name. The function prints a greeting to the console using the argument provided.
To call the function, we simply use the function name greet followed by parentheses and the argument we want to pass in, which in this case is the string “Alice”. When the function is called, it will print “Hello, Alice!” to the console.
You can also define functions with default values for arguments, like this:
# Define a function with a default argument value
def greet(name="World"):
print("Hello, " + name + "!")
# Call the function with and without arguments
greet() # prints "Hello, World!"
greet("Alice") # prints "Hello, Alice!"
In this example, we defined the greet function with a default argument value of "World". If no argument is provided when the function is called, it will use the default value. If an argument is provided, it will use the argument instead.
You can also define functions that return values using the return keyword, like this:
# Define a function that returns a value
def add(a, b):
return a + b
# Call the function and store the result in a variable
result = add(2, 3)
print(result) # prints 5
In this example, we defined the add function, which takes two arguments and returns their sum using the return keyword. When we call the function with arguments 2 and 3, it returns the value 5, which we store in the variable result and print to the console.
