1
Double slash // Between /* and */ Var tells browser to create new variables var x=5+6; var y=x*9; Keywords are used to identify action to be perform. 50 An expression is a combination of values, values and operators which computes a value JavaScript is the most popular programming language in the world. A programming language is a formal constructed language designed to communicate instructions to a machine, particularly a computer. • In <head> and <body> using <script>…</script> • In an external file <script src=“file.js”>…</script> • Alert box: window.alert() • HTML Doccument: document.write() • HTML Element: innerHTML.* • Console: console.log() Values Operators Expressions Keywords Comments Values Fixed Values Variable values literates variables 10.05; 1001; ‘afk’; var x ; x = 6 ; In programming language, Variables are used to store data values. semicolon Statement terminator It separates statements ; Values Assignment operator Arithmetic operators To assign values to variables = 1. var x = 5; 2. var y = “afkTech”; To compute values + - * / 1. (5+6)*10; 2. ((2+3)/3)*2; Expression 5*10 x*10 x*y “a”+ “ ”+ “F” + “ ” + “K” a F K 20 6 var x =2; var x=2; var y=3; Keywords Non executables in code Comments o A must learn language for web development o Most popular programming language o Easy to learn ! [relatively :p ] JavaScript Infographics -01 Made by Kingshuk with love in Bangladesh www.Jontrojog.com www.fb.com/groups/JPC.public www.fb.com/Jontrojog http://afkingshuk.blogspot.com www.fb.com/afktechnologies Special thanks to W3Schools.com and 10MinutesSchool
