Method Parameters

Information can be passed to methods as parameters. Parameters act as variables inside the method.

Parameters vs. Arguments

These terms are often used interchangeably, but there is a slight difference:

• Parameter: The variable defined in the method declaration (e.g., String fname).
• Argument: The actual value you pass when you call the method (e.g., "Liam").

// 'fname' is a parameter
static void printName(String fname) {
    System.out.println("Hello " + fname);
}

public static void main(String[] args) {
    // "Liam" is an argument
    printName("Liam");
}

Multiple Parameters

You can have as many parameters as you like, separated by commas.

static void printDetails(String name, int age) {
    System.out.println(name + " is " + age + " years old.");
}

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Values vs Variables

You can pass literal values (like 5) or variables (like x) as arguments.

int x = 10;
myMethod(x); // Passing variable
myMethod(20); // Passing literal

Summary