What Is Function Call in Data Structure?


Angela Bailey

A function call is a fundamental concept in data structures. It allows us to execute a specific set of instructions defined within a function. In this article, we will explore what a function call is, how it works, and why it is crucial for organizing and reusing code.

What is a Function Call?

A function call is an instruction that tells the program to execute a specific function. It consists of the function name followed by parentheses (). Inside these parentheses, we can provide arguments (if any) that the function requires to perform its task.

How Does a Function Call Work?

When a program encounters a function call, it temporarily suspends the current execution and transfers control to the called function. The called function executes its statements, performs any necessary operations using the provided arguments, and then returns control back to the calling statement.

Let’s take an example to understand this better:

function greet(name) {
    console.log("Hello, " + name + "!");


In the code snippet above, we define a function called greet. It takes one parameter name, which represents the name of the person we want to greet. The console.log() statement inside the greet function displays a greeting message containing the provided name.

The line greet(“John”); is where we actually call the greet function with an argument “John”. This triggers the execution of the greet function and displays “Hello, John!” in the console.

The Importance of Function Calls

Function calls play a vital role in code organization and reusability. By encapsulating a set of instructions within a function, we can modularize our code and eliminate redundancy. Instead of writing the same code multiple times, we can simply call the function whenever we need to perform that specific task.

Additionally, function calls allow us to pass arguments and receive return values. This enables us to customize the behavior of a function based on the provided inputs and obtain results that can be used further in our program.


In data structures, a function call is an essential concept that enables us to execute predefined sets of instructions. It offers code organization, reusability, and customization capabilities through arguments and return values. Understanding how function calls work is crucial for developing efficient and maintainable code.

Now that you have learned about function calls in data structures, you can utilize this knowledge to write cleaner and more organized code.

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