HTMLCODE:
< Head >
< Title > Demo Program - To test Logical Operators in JavaScript < /Title >
< /Head >
< Body >
< script language="javascript" javascript" >
var value1 = 522, value2=10;
document.write("< br >Data1 : "+value1);
document.write("< br >Data2 : "+value2);
var res1=((value1 > 100) && (value1 > 601));
var res2=((value1 > 100) II (value1 > 601));
var res3=(!(value1!=value2));
document.write("< br > < br > Whether Datal> 100 AND Data1 > 601 : "+res1);
document. write(" < br > < br > Whether Data1>600 OR Data1 > 601 : "+res2);
document.write("< br >Whether !Data1 != Data" : "+res3);
< /script >
< /Body >
< /Html >
Interested and these activities bring him profit, money, prestige and power. < /p > < p > In economic sense, the term business means works, efforts and acts of people, which are connected with the production of wealth and activities, which are directed with the object of making profit. < /p > < p > Production and distribution of goods to consumers for a profit constitute business. < /p >

HTML CODE:
< Html >
< Head >
< Title >Demo Program - To test Relational(Comparison) Operators in JavaScript
< /Title >
< /Head >
< Body >
< script language="javascript" type="text/ javascript" >
Chaptervar
value1 = 522, value2=10;
document.write("< br >Data1 : "+value1);
document.write("< br >Data2 : "+value2);
document. write(" < br > < br > Whether Data 1 = Data2 : "+(value1==value2));
document.write("< br > Whether Datal < Data2 : "+(value1 < value2));
document.write("< br >Whether Datal> Data2 : "+(value1 > value2));
document.write("< br > Whether Datal <= Data2 : "+(value1 < =value2));
document.write("< br > Whether Datal  > = Data2 : "+(value1 > =value2));
document.write("< br > Whether Datal != Data2 : "+(value!=value2));
< /script >
< /Body >
< /Html >

Rules for naming variable:
(i) The first character must be a letter or an underscore ( _ ). Number cannot be as the first character
(ii) The rest of the variable name cap include any letter, any number, or the underscore. You can't use any other characters, including spaces, symbols, and punctuation marks.
(iii) JavaScript variable names are case sensitive. 
(iv) That is, a variable named Register Number is treated as an entirely different variable than one named register number.
(v) There is no limit to the length of the variable name.
(vi) JavaScript's reserved words cannot be used as a variable name. All programming languages have a supply of words that are used internally by the language and that. cannot be used for variable names

The lexical structure of a programming language is the set of elementary rules that specifies how to write programs in that language. It is the lowest - level syntax of a language. The Lexical structure specifies variable names, the delimiter characters for comments, and how 'one program statement is separated from the next.
(i) Though JavaScript is a case-sensitive language. It is good programming practice to type the command in lowercase.
(ii) JavaScript ignores spaces that appear between tokens (identifiers, operators, punctuator, constants and keywords) in programs.
(iii) JavaScript supports two styles of comments. Any text follow a " // " and the end of a line is treated as a single line comment and is ignored by JavaScript. Any text between the characters " /* *I " is also treated as a multiline comment.
(iv) JavaScript uses the semicolon (;) to separate statements. Many JavaScript programmers use semicolons to explicitly mark the ends of statements
(v) A literal is a data value for variable that appears directly in a program.
(vi) An identifier is simply a name. In JavaScript, identifiers are used to name variables, functions and to provide labels for certain loops in JavaScript code.
(vii) In JavaScript certain keywords are used as reserved words, These words cannot used as identifiers in the programs

Steps to follow to code JavaScript Language :
(i) Enter HTML and JavaScript code using any text editor.
(ii) Save the latest version of this code.
(iii) Use any browser to see the result. For example: Internet Explorer, Google Crome, etc.,
(iv) If this is a new document, open the file via browser's Open Menu.
(v) If the document is already loaded in the Memory, to reload the file into the browser use "Refresh" or press F5 button.