Using Functions
Why Use Functions?
Repeating code makes programs long and hard to maintain. Functions let you group commands into a reusable block, reducing repetition and making your code cleaner.
How to call Functions?
To call a function, simply use its name followed by parentheses, placing any required arguments inside those parentheses.
In the example below, the greet
function is called on line 5 by adding parentheses to its name and passing "Alice" as the name argument.
A Simple Function Example
12345function greet(name) { console.log("Hello, " + name + "!"); } greet("Alice");
Here’s what happens when you call greet("Alice")
:
- JavaScript looks for the function named
greet
. - It passes the string "Alice" as the argument for the parameter
name
. - Inside the function, the console.log statement concatenates "Hello, ", the value "Alice", and "!" to create the full greeting.
- The final message "Hello, Alice!" is then printed to the console.
Swipe to start coding
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Using Functions
Pyyhkäise näyttääksesi valikon
Why Use Functions?
Repeating code makes programs long and hard to maintain. Functions let you group commands into a reusable block, reducing repetition and making your code cleaner.
How to call Functions?
To call a function, simply use its name followed by parentheses, placing any required arguments inside those parentheses.
In the example below, the greet
function is called on line 5 by adding parentheses to its name and passing "Alice" as the name argument.
A Simple Function Example
12345function greet(name) { console.log("Hello, " + name + "!"); } greet("Alice");
Here’s what happens when you call greet("Alice")
:
- JavaScript looks for the function named
greet
. - It passes the string "Alice" as the argument for the parameter
name
. - Inside the function, the console.log statement concatenates "Hello, ", the value "Alice", and "!" to create the full greeting.
- The final message "Hello, Alice!" is then printed to the console.
Swipe to start coding
Ratkaisu
Kiitos palautteestasi!
Awesome!
Completion rate improved to 3.57ninja.js
index.html
preset.js