Nested IF Statements and Algorithms

This tutorial is part of a web programming course for people who have no programming experience.

Nested IF Statements

Nested IF Statements - Here are the requirements for our program:

• If the user likes books, ask them if they like Sci Fi books:
  • If the user likes Sci Fi books, then recommend Frankenstein.
  • If the user does NOT like Sci Fi books, then recommend Gone With the Wind.
• If the user does NOT like books, then ask them if they like movies.
  • If the user likes movies, then recommend the movie Social Networking.
  • If the user does NOT like movies, then recommend that they take up knitting.

Here's how we can write code for the algorithm:

var likesBooks = prompt("Do you like books (enter 'yes' or 'no')?");

if(likesBooks == "yes"){
  // the user likes books...

  var likesSciFi = prompt("Do you like Sci Fi books (enter 'yes' or 'no')?");
  
  if(likesSciFi == "yes"){
    alert("I recommend Frankenstein!");
  }else{
    alert("I recommend Gone With the Wind!");
  }

}else if(likesBooks == "no"){
  // the user does NOT like books...

  var likesMovies = prompt("Do you like movies (enter 'yes' or 'no')?");
  
  if(likesMovies == "yes"){
    alert("I recommend Social Networking!");
  }else{
    alert("I recommend knitting!");
  }

}else{

  alert("It was a yes/no question! And remember that JS is case sensitive!");

}

MAKE SURE TO TEST ALL POSSIBLE CODE BRANCHES

Flow Charts and Algorithms