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Introduction to JavaScript
Introduction to JavaScript
Definition
To create a new function, use the function
keyword. Provide a name for the function and define any arguments it should accept:
The structure of a function definition includes:
- The
function
keyword; - The function name, typically in camelCase like variables;
- Arguments enclosed in parentheses
()
; - A code block within curly brackets
{}
.
Arguments
Functions have their own data storage space. Arguments are values passed to a function, which the function uses as variables. These arguments cease to exist when the function finishes executing.
To define arguments, assign a name to each one:
If a function accepts multiple arguments, separate them with commas (,
).
Note
Arguments are used like variables inside the function's code block.
Function calling
To use a function, call it using parentheses ()
and provide the necessary arguments if the function expects any:
// Function Definition function func(arg) { console.log("Argument received:", arg); console.log("Argument type:", typeof arg); } // Function Calling func(1); func(2521); func("Rabbit"); func(true);
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