JavaScript Statements In Js Programming Language

In the programming language, the programming instruction is known as statements. A JavaScript program is a list of programming javascript statements.

The JavaScript statements are consists of values, operators, keywords and comments.

Example  1:

<!DOCTYPE html>
<html>
<body>
<h2> A Hello JavaScript Statements</h2>
<p>A JavaScript called list of statements to be run by a computer.</p>
<p id="darkweb"></p>
<script>
var a, b, sum;  // Statement 1
a = 786;        // Statement 2
b = 13;        // Statement 3
sum = a + b;    // Statement 4
document.getElementById("darkweb").innerHTML =
"The sum is =" + sum + ".";  
</script>
</body>
</html>

Example  2:

<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Hello Statements</h2>
<p>Welcome to Hello JavaScript</p>
<p id="darkweb"></p>
<script>
document.getElementById("dark").innerHTML = "Hello India.";
</script>
</body>
</html>

JavaScript Line Length and Line Breaks

Most of the time the programmers don’t like or avoid  codes line longer than 80 characters. The best place to break it is after an operator, if the JavaScript  statement does not fit on one line.

Example:

<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Hello Statements</h2>
<p>
Welcome to Hello JavaScript. 
</p>
<p id="darkweb"></p>
<script>
document.getElementById("darkweb").innerHTML =
"Hello India!";
</script>
</body>
</html>

Code Blocks in JavaScript

In  JavaScript the statements can be groups together in a code blocks inside the curly brackets {  }. It is used to define the statements to be executed together.

Example:

<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Hello Statements</h2>
<p>In JavaScript programming code blocks are written between { }</p>
<button type="button" onclick="myFunction()">Click Me here</button>
<p id="darkweb1"></p>
<p id="darkweb2"></p>
<script>
function myFunction() {
  document.getElementById("darkweb1").innerHTML = "Hello India!";
  document.getElementById("darkweb2").innerHTML = "welcome to javascript programming";
}
</script>
</body>
</html>

JavaScript  Keywords

Keywords are reserved words and used for specific number of time and keywords cannot be used as a variable names.

The JavaScript  Statements  starts from a keywords to identify the JavaScript  action that is to be performed.

There are following keywords that are used in JavaScript:

KeywordDescription
breakTo terminates a switch or a loop
continueTo Jumps out of a loop and starts at the top
forTo repeats the statement  until the condition remain true
do whileRepeats the statements for specific number of time
debuggerTo perform debugging process while stops the execution of block of statements
function Used to declare a function
varUsed to declare a function
returnIt  is used to exit a function
SwitchUsed to execute set or block of statement depending on cases
if elseIt is used to execute the statements depending upon the condition

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