JS Statement Syntax
JavaScript statements are instructions that are executed by a web browser or a JavaScript engine. Here are the basic syntax and rules for creating JavaScript statements:
1. Syntax: A JavaScript statement can be created by writing a valid JavaScript code followed by a semicolon (;).
Example:
javascript Copy code;
var x = 10;
console.log(x);
2. Multiple statements can be written in a single line using semicolons to separate them.
Example:
javascript Copy code;
var x = 10; console.log(x); alert("Hello world!");
3. A statement can also span multiple lines, but it should be enclosed in curly braces ({}) to create a block of code.
Example:
javascript Copy code;
if (x > 0) {
console.log("x is positive.");
} else {
console.log("x is non-positive.");
}
4. JavaScript is a case-sensitive language, so the statements should be written with the correct casing.
5. Comments can be added to the code to make it more understandable.
Example:
javascript Copy code;
// This is a comment
var x = 10; // This is also a comment
6. Indentation can be used to make the code more readable.
Example:
javascript Copy code;
if (x > 0) {
console.log("x is positive.");
} else {
console.log("x is non-positive.");
}
7. JavaScript has several types of statements, such as conditionals, loops, and function calls. Here are some examples:
javascript Copy code;
// Conditional statement
if (x > 0) {
console.log("x is positive.");
} else {
console.log("x is non-positive.");
}
// Loop statement
for (var i = 0; i < 10; i++) {
console.log(i);
}
// Function call statement
alert("Hello world!");
Remember that each JavaScript statement must be syntactically correct, and should perform a specific action in your code.
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