JavaScript String Methods Functions Example

JavaScript String Methods Functions Example

There are Following List of JavaScript String Functions Example.

  • String Length.
  • indexOf() :Finding a String using JavaScript.
  • lastIndexOf() :Finding a String using JavaScript.
  • search() :Searching for a String using JavaScript.
  • slice() Method with Example.
  • substring() Method with Example.
  • Replacing String replace(): Method with Example.
  • Converting to Upper Case Example.
  • Converting to Lower Case Example.
  • The concat(): Method with Example.
  • split() : Method Convert a String to an Array Example.

String Length

var strval = "pakainfofreedevelopedbyangularjskinganddsppatel";
var result = strval.length;
console.log(result);
alert(result);

indexOf() :Finding a String using JavaScript

var strvalue = "I learn Angularjs";
alert( strvalue.indexOf("I learn") ); // zero (ex.first character position index start)
alert( strvalue.indexOf("learn")   ); // 2

var strvalue = "I learn Angularjs";
alert( strvalue.indexOf("pakainfo") ); // Not found: The returns -1

lastIndexOf() :Finding a String using JavaScript

var strvalue = "I learn Angularjs for Pakainfo.com";
document.write(strvalue.lastIndexOf('learn'));  
document.write(strvalue.lastIndexOf('com'));  
document.write(strvalue.lastIndexOf('for'));  

search() :Searching for a String using JavaScript

var strvalue = "I learn Angularjs for Pakainfo.com";
var result = strvalue.search("Angularjs"); 
console.log(result);
alert(result);

slice() Method with Example

var strval = "pakainfo, pakainfo example, pakainfo";
var result = strval.slice(7,14); 
console.log(result);
alert(result);

substring() Method with Example

var strval = "pakainfo, pakainfo example, pakainfo";
var result = strval.substring(7,14); 
console.log(result);
alert(result);

substr() Method with Example

var strval = "pakainfo, pakainfo example, pakainfo";
var result = strval.substr(7,6); 
console.log(result);
alert(result);

Replacing String replace(): Method with Example

var strval = "pakainfo, pakainfo example, pakainfo";
var result = strval.replace('pakainfo','angularking'); 
console.log(result);
alert(result);

Converting to Upper Case

var strvalue = "Hello World! - welcome to Angularjs";  
var result = strvalue.toUpperCase(); 
console.log(result);
alert(result);

Converting to Lower Case

var strvalue = "Hello World! - welcome to Angularjs";  
var result = strvalue.toLowerCase(); 
console.log(result);
alert(result);

The concat(): Method with Example

var strval1 = "Hello World!";
var strval2 = "welcome to Angularjs";
result = strval1.concat(" ", strval2); 
console.log(result);
alert(result);

split() : Method Convert a String to an Array Example

var strval = "a,n,g,u,l,a,r,j,s";
var result = strval.split(",");
console.log(result[0]);
console.log(result[1]);
console.log(result[2]);
alert(result[1]);

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