Page 115 - DCAP202_Fundamentals of Web Programming

Fundamentals of Web Programming

Notes 8.5 Summary

 JavaScript statements consist of keywords used with the appropriate syntax.
 Conditional Statements give the JavaScript code you are writing the ability to make
decisions or perform single or multiple tasks.
 The switch/case conditional statement is used to test all of the possible outcomes for the
application you are designing.

 The for loop is used when you know in advance how many times the script should run.
 The break statement will break the loop and continue executing the code that follows after
the loop (if any).

 A function contains code that will be executed by an event or by a call to the function.
 A function literal is an expression that defines an unnamed function.
 An user-defined function saves us from rewriting the same code again and again and helps
us to make our application smaller.
 Dialog boxes can be used to raise and alert, or to get confirmation on any input or to have
a kind of input from the users.

8.6 Keywords

Alert dialog box: An alert dialog box is mostly used to give a warning message to the users.
Break statement: It will break the loop and continue executing the code that follows after the
loop (if any).

Conditional Statements: It gives the JavaScript code you are writing the ability to make decisions
or perform single or multiple tasks.
Confirmation dialog box: A confirmation dialog box is mostly used to take user’s consent on
any option.
Function literal: A function literal is an expression that defines an unnamed function.
Switch case: Conditional statement is used to test all of the possible outcomes for the application
you are designing.
User-defined function: An user-defined function saves us from rewriting the same code again
and again and helps us to make our application smaller.
While loop: This loop loops through a block of code while a specified condition is true.

8.7 Review Questions

1. Differentiate between functions and statements in JavaScript.
2. What is the use of if-else and switch statements?

3. Discuss break-continue statements with example.
4. What are the built-in functions in JavaScript?
5. Differentiate between built-in functions and user-defined functions.

6. What is the difference between for and while loop statements?

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