This article is an example of Python function usage. Shared for your reference, as follows:
(function definition):
# say_hello() # can't call a function before defining it
# The Python interpreter knows that a function is defined below
def say_hello():
"""Documentation of functions"""
print("hello 1")
print("hello 2")
print("hello 3")
print("Before calling the function")
# Only in a program that actively calls a function to get it to execute
say_hello()
print("After the function is called")
Run results:
Before calling the function
hello 1
hello 2
hello 3
After calling the function
(function arguments, return values):
def sum_2_num(num1, num2):
"""Summing two numbers."""
result = num1 + num2
return result # Return results via return
# Variables can be used to receive the results of a function's execution.
sum_result = sum_2_num(10, 20)
print("Calculation: %d" % sum_result)
Run results:
Calculation: 30
(Nesting of functions):
def test1():
print("*" * 50)
def test2():
print("-" * 50)
# Nested calls to functions
test1()
print("+" * 50)
test2()
Run results:
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I hope that what I have said in this article will help you in Python programming.