<\/p>\n
Python Functions Tutorial<\/strong>, in this tutorial, we will learn Introduction to Function in Python and Type of Functions in Python. Here, You will also learn how to create and call a function in Python which is helpful for any Python developers. Are you looking for the Python functions tutorial with examples or Are you dreaming to become to certified Pro Python Developer<\/a>, then stop just dreaming, get your Python certification course<\/a> from India\u2019s Leading Python training institute<\/a>.<\/p>\n <\/p>\n Do you want to know about how to create and call a function and types of functions in python, then just follow the below mentioned Python functions tutorial for Beginners from Prwatech<\/a> and take advanced Python training<\/a> like a Pro from today itself under 10+ years of hands-on experienced Professionals.<\/p>\n <\/p>\n <\/p>\n A function is a block of code that only runs when it is called. You can pass inputs that are known as parameters, into a function. A function gives results by returning data or value. The function is created for the reusability of the same code.<\/p>\n <\/p>\n <\/p>\n We can find three kinds of functions in python:<\/p>\n <\/p>\n <\/p>\n The First type is built-in functions, such as print() to print the expected value or result, min() to get the minimum value, bool()to get boolean value, etc.<\/p>\n <\/p>\n <\/p>\n The second type is User Defined Functions( UDF), which are functions created by users.<\/p>\n <\/p>\n <\/p>\n The third type is \u2018Anonymous functions\u2019, which are also known as lambda functions. They are not declared with the standard keyword\u2018def\u2019<\/strong>.<\/p>\n <\/p>\n <\/p>\n We have to use \u2018def\u2019 to declare a function followed by a function’s name. Then we have to add parameters to the function within the parentheses of the function. If we don\u2019t write the return statement, the function will return \u2018None\u2019.<\/p>\n <\/p>\n Ex)<\/strong> deftest():<\/p>\n print(“Python”)<\/p>\n return<\/p>\n <\/p>\n <\/p>\n To call a function, we have to use the function name followed by round brackets (parenthesis):<\/p>\n Syntax:<\/strong><\/p>\n function_name()<\/em><\/p>\n Above function be called a test()<\/p>\n Output:\u00a0<\/strong>Python<\/p>\n <\/p>\n <\/p>\n Arguments are given to any function call, while the function mentions the arguments by their parameter names. There are four types of arguments for UDFs.<\/p>\n Default arguments<\/p>\n Required arguments<\/p>\n Keyword arguments<\/p>\n Variable number of arguments<\/p>\n <\/p>\n <\/p>\n During the function call these arguments to take a default value if no argument is passed. We can allocate this default value with the assignment operator denoted by \u2018=\u2019.<\/p>\n Ex)\u00a0<\/strong>def multi(x,y = 5):<\/p>\n return x * y<\/p>\n # Callingmulti() with only single parameter<\/p>\n multi(x=1)<\/p>\n Output:<\/strong><\/p>\n 5<\/p>\n # Call multi() with both x and y parameters<\/p>\n multi(x=1, y=3)<\/p>\n Output:<\/strong><\/p>\n 3<\/p>\n <\/p>\n <\/p>\n During function call, these arguments need to be passed with the right order exactly, as shown in the following example:<\/p>\n Ex)\u00a0<\/strong>def multi(x,y):<\/p>\n return x * y<\/p>\n # Calling function Output<\/p>\n multi(12,5)<\/p>\n Output:<\/strong><\/p>\n 60<\/p>\n <\/p>\n <\/p>\n If we want to check whether all parameters are\u00a0 sequentially or with the right order we use keyword argument. To identify the arguments by parameter names we use these keywords arguments.<\/p>\n Ex)\u00a0<\/strong># Defining function<\/p>\n def multi(x,y):<\/p>\n return x * y<\/p>\n # Calling function with parameters<\/p>\n multi(5,10)<\/p>\n Output:<\/strong><\/p>\n 50<\/p>\n # Calling the same function with keyword arguments<\/p>\n plus(x=5, y=10)<\/p>\n output:<\/strong><\/p>\n 50<\/p>\n <\/p>\n <\/p>\n We can use * args in that case. Let\u2019s see one example.<\/p>\n Ex)\u00a0 # Defining function and try to give more than 2 arguments.<\/p>\n deftest(*args):<\/p>\n for in args:<\/p>\n print(i)<\/p>\n # Displaying the output<\/p>\n test(\u2018Variable\u2019,\u2019Number\u2019,\u2019type\u2019,\u2019 argument\u2019)<\/p>\n Output:<\/strong><\/p>\n The variable Number type argument<\/p>\n <\/p>\n <\/p>\n It can take any number of arguments, but can only have one expression.<\/p>\n <\/p>\n Syntax: <\/strong><\/p>\n lambda arguments: expression<\/p>\n The expression is perform and the result is retain:<\/p>\n Ex)<\/strong>\u00a0By using the single variable we can use a lambda function<\/p>\n x = lambda b : b + 30<\/p>\n print(x(5))<\/p>\n Output:<\/p>\n 35<\/p>\n Ex)\u00a0\u00a0Using more than one variable we can use lambda function as:<\/p>\n avg = lambda x,y :(x+y)\/2<\/p>\n print(avg(5,7))<\/p>\n Output:<\/strong><\/p>\n 6.0<\/p>\n <\/p>\n <\/p>\n The benefit of lambda is, we can use it as an anonymous function inside another function.<\/p>\n Ex)\u00a0<\/strong>deffunc1(a): <\/p>\n We hope you understand Python functions tutorial with examples, python function arguments and Lambda Function in Python Programming concepts. Get success in your career as a Python developer<\/a> by being a part of the Prwatech<\/a>, India’s leading Python training institute in Bangalore<\/a>.<\/p>\n <\/p>\n <\/p>\nIntroduction to Function in Python<\/h2>\n
Type of Functions in Python<\/h2>\n
Built-in Functions in Python<\/h3>\n
User-Defined Functions in Python<\/h3>\n
Anonymous functions in Python<\/h3>\n
How to create a function in Python<\/h2>\n
Calling a Function<\/strong><\/h3>\n
Python Function Arguments<\/h2>\n
Default argument<\/strong><\/h3>\n
Required Arguments<\/strong><\/h3>\n
Keyword Arguments<\/strong><\/h3>\n
Variable Number of Arguments:<\/strong><\/h3>\n
Anonymous Functions in Python<\/strong><\/h2>\n
Why use Lambda Functions?<\/strong><\/h3>\n
\nreturn lambda b: b * a<\/p>\n