Lesson 1 of 15
Hello, World!
Your First JavaScript Program
JavaScript's built-in function for printing output is console.log():
console.log("Hello, World!");
This prints the string to the console, followed by a newline. You can log any value — strings, numbers, booleans:
console.log("hello"); // hello
console.log(42); // 42
console.log(true); // true
Comments
Single-line comments start with //. Everything after // on the same line is ignored:
// This is a comment
console.log("code"); // This is also a comment
Multi-line comments use /* ... */:
/* This spans
multiple lines */
console.log("done");
Your Task
Print exactly Hello, World! using console.log.
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Click "Run" to execute your code.