JavaScript RegExp Object The Javascript RegExp object consists of properties and methods that are used to find and replace characters that fit in a string. JavaScript Math Object Example Match() <script type=”text/javascript”> <!– var txt = “Los Angels is a magic city”; var a = /angels/i; document.write(txt.match(a)); //–> </script> Result: Angels Example Test() <script type=”text/javascript”> <!– var a=new… Read More »
JavaScript Math Object The Javascript Math object is used for performing mathematical calculations using properties and functions like: max, min, round, random, sin, cos, sqrt, log, ceil, abs, e, pi. JavaScript Math Object Example Max() <script type=”text/javascript”> <!– var a = document.getElementById.innerHTML=Math.max(3,7); document.write(a); //–> </script> Result: 7 Example Min() <script type=”text/javascript”> <!– var a = document.getElementById.innerHTML=Math.min(3,7); document.write(a); //–>… Read More »
JavaScript String Object The Javascript String object is a series of characters in a character string. With String object you can manipulate strings. JavaScript Array Object Example 1: <script type=”text/javascript”> <!– var city=”New York city!”; document.write(city.length); //–> </script> Result: 14 Example 2: <script type=”text/javascript”> <!– var str=”Hello visitor, welcome to www.javascriptutorial.com “; var n=str.indexOf(“visitor”); document.write(n); //–> </script> Result:… Read More »
JavaScript Array Object The Javascript Array object is a one-dimensional array that has several properties and methods. JavaScript stores lists of values in array. Create JavaScript Array Object Example 1: <script type=”text/javascript”> <!– var cities=new Array(); cities[0]=”London”; cities[1]=”New York”; cities[2]=”Toronto”; cities[3]=”Berlin”; cities[4]=”New Delhi”; document.write(cities[2]); //–> </script> Result: Toronto Example 2: <script type=”text/javascript”> <!– var cities=new Array(“London”, “New York”,… Read More »
JavaScript Objects JavaScript Objects An object is a collection of properties and methods withheld under one name. Properties Properties or attributes of an object describes the special features and identity. <script> var a=”Hello people!”; document.write(a.length); </script> Result: 13 Methods Methods or functions of an object are actions that can be performed on an object. <script> var a=”Hello people!”;… Read More »
JavaScript Events JavaScript Events A JavaScript function is a section of code that perform a specific task when called. Calling a function is achieved by its name. Syntax: function function_name() { function code } Example: <html> <head> <script> function helloFunction() { alert("Hello people!"); } </script> </head> <body> <input type=”button” onclick=”helloFunction()” value=”Press button” /> </body> </html> Result: JavaScript Event… Read More »
JavaScript Functions JavaScript Functions A JavaScript function is a section of code that perform a specific task when called. Calling a function is achieved by its name. Syntax: function function_name() { function code } Example: <html> <head> <script> function helloFunction() { alert("Hello people!"); } </script> </head> <body> <button onclick="helloFunction()">Press button</button> </body> </html> Calling the Function: <script type=”text/javascript”> <!–… Read More »
JavaScript While Loop Statement JavaScript While Loop Statement While Loop statement is a repetitive statement which is executed after evaluating the condition. If the resulting value is true the the execution is repetead until becomes false. Syntax: while (condition){ If condition is true the the statement is executed } Example: <script type=”text/javascript”> <!– var a = 0; document.write(“Start… Read More »
JavaScript For Loop Statement JavaScript For Loop Statement For Loop statement – is a loop statement that evaluates the expression. If it meets the condition of initialization then increment the value of initialization and repeat execution steps until no longer meets execution. Syntax: for (initialization; condition; incrementation){ If condition is true then execute the statement }
JavaScript Switch Case Statement JavaScript Switch Case Statement Switch Case statement is used when we have to chose between several individual cases after the evaluation of an expression. Syntax: switch (expression) { case v_1: statement_1; break; case v_2: statement_2; break; case v_3: statement_3; break; … case v_n: statement_n; break; [default: statement_n+1]; } Switch Case statement evaluates the expression.… Read More »