Page 272 - Web_Application_v2.0_C12_Fb
P. 272
ii. concat() joins two or more strings.
var result = "Harry".concat("Potter");
document.write(result);
Output:
HarryPotter
iii. charAt()
Returns the character at a specified index.
var str = "JavaScript";
var result = str.charAt(4);
document.write(result);
Output:
S
iv. trim()
Removes whitespace from both ends of a string.
var str = " Hello World ";
var result = str.trim();
document.write(result);
Output:
Hello World
2. Differentiate between Property and Method through an example.
Ans.
Property Method
Property can be value or function. Method is a function
Property defines the characteristics of an object like size, Methods performs an action on objects.
colour etc.
Example: Example:
var student = { var teacher = {
name: "Rahul", //Property greeting: function() {
age : 45 //Property //Method
}; document.write ("Welcome");
}};
3. What are objects in JavaScript? Explain with an example.
Ans. In JavaScript, an object is a collection of key-value pairs where keys are strings (or Symbols) and values can be any
data type, including numbers, strings, functions, or even other objects. Objects allow you to store and organize
related data efficiently.
You can create an object using object literals {} or using the new Object() constructor.
For example:
const person = {
name: "John",
age: 30,
city: "New York"
};
console.log(person.name); // Output: John
console.log(person.age); // Output: 30
270 Touchpad Web Applications (Ver. 2.0)-XII

