JavaScript – Programs on Strings – Ameerpet Technologies

Display String elements in reverse order:

<html>
            <body>
                        <script>
                                    var name = “amar” ;
                                    for(var i=name.length-1 ; i>=0 ; i–){
                                                document.write(name.charAt(i) + “<br/>”);
                                    }
                        </script>
            </body>
</html>

Display only digits in the given string:

Display the count of Upper-case characters, lower case characters, digits and symbols:

<html>
            <body>
                        <script>
                                    var name = “Amar@123” ;
                                    var c1=0, c2=0, c3=0, c4=0;
                                    for(var i=0 ; i<name.length ; i++){
                                                var ch = name.charAt(i);
                                                if(ch>=’A’ && ch<=’Z’)
                                                            c1++;
                                                else if(ch>=’a’ && ch<=’z’)
                                                            c2++;
                                                else if(ch>=’0′ && ch<=’9′)
                                                            c3++;
                                                else
                                                            c4++;
                                    }
                                    document.write(“Upper case characters : ” + c1 + “<br/>”);
                                    document.write(“Lower case characters : ” + c2 + “<br/>”);
                                    document.write(“Digits case characters : ” + c3 + “<br/>”);
                                    document.write(“Symbols case characters : ” + c4 + “<br/>”);
                        </script>
            </body>
</html>

Display Strings in the given array:

<html>
            <body>
                        <script>
                                    var arr = [“HTML”, “CSS” , “JavaScript”, “Angular” , “React” , “VueJS”];
                                    document.write(“Array items are : <br/>”);
                                    for(var i=0 ; i<arr.length ; i++){
                                                document.write(arr[i] + “<br/>”);
                                    }
                        </script>
            </body>
</html>

Display word count in the given sentence(String):

<html>
            <body>
                        <script>
                                    var line = “This is online web technologies session” ;
                                    var arr = line.split(” “);
                                    document.write(“Words count : ” + arr.length);
                        </script>
            </body>
</html>

Display words in the given string:

<!doctype html>
<html>
            <body>
                        <script>
                                    var line = “This is online web technologies session” ;
                                    var arr = line.split(” “);
                                    for(var i=0 ; i<arr.length ; i++)
                                    {
                                                document.write(arr[i] + ” <br/>”);
                                    }
                        </script>
            </body>
</html>

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