{"id":57490,"date":"2019-06-03T14:04:52","date_gmt":"2019-06-03T08:34:52","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=57490"},"modified":"2021-05-14T17:08:05","modified_gmt":"2021-05-14T11:38:05","slug":"function-in-c-and-cpp","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/function-in-c-and-cpp\/","title":{"rendered":"Function in C and C++ [Quiz included]"},"content":{"rendered":"

Function in C and C++ is a set of statements that we use in order to take various inputs and perform some calculations or computations to obtain the output<\/em>. This tutorial is specially dedicated to functions in the C\/C++ programming language, that covers its syntax, types, significance, different ways to call a function, and types of function arguments. Let’s start our journey with an example.<\/p>\n

Suppose you want to compute the area of a right-angled triangle for a given set of 10 triangles. A novice at programming who does not have the knowledge of functions would probably say:<\/p>\n

Define 10 separate variables to store the area of each triangle and then display it.<\/p>\n

Sounds pretty inconvenient, right?\u00a0What if the number of triangles whose area to be computed is increased to 30? It is not practically feasible to follow the traditional method. This is where the role of functions comes into play.<\/p>\n

The above-mentioned problem can easily be resolved by defining a function to compute the area of a triangle taking 2 parameters into consideration, that is, base and height. Then, we can define a single variable that would return its area. The parameters of the 30 triangles in hand simply need to be passed to the function and we get their respective areas without much hassle.<\/p>\n

Don’t forget to check quiz on functions in C and C++<\/strong> at the end of this tutorial<\/em><\/p>\n

Function in C and C++<\/h2>\n

In layman language<\/strong>, a function is anything that is done to achieve a specific purpose<\/em>.<\/p>\n

In programming<\/strong>, a function refers to the collection of statements that together performs a specific task<\/em>. Functions give you the provision to divide your code into fragments to reduce code complexity, which you might have already inferred after pondering on the introductory problem statement.<\/p>\n

Key takeaway:<\/strong> Every program in C and C++ has at least one function, that is, the main()<\/strong> <\/em>function<\/strong>.<\/p>\n

Syntax of Function<\/h2>\n

The basic syntax of a function in C\/C++ has 2 parts, namely:<\/p>\n

1. Function Declaration\u00a0<\/strong><\/p>\n

return_type function_name( parameter list );<\/strong><\/em><\/p>\n