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JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Super Conditional Challenge

Posted by ammarkhan
.a{fill-rule:evenodd;}techdegree
ammarkhan
Front End Web Development Techdegree Student 21,661 Points

What is wrong with comparsion op

!== is 'not equal to', but still i cannot print the right statement, why?

script.js 
var money = 9;
var today = 'Friday'

if ( money >= 100 || today === 'Friday' ) {
  alert("Time to go to the theater");    
} else if ( money >= 50 || today === 'Friday' ) {
  alert("Time for a movie and dinner");    
} else if ( money > 10 || today === 'Friday' ) {
  alert("Time for a movie");   
} else if ( today !== 'Friday' ) {
  alert("It's Friday, but I don't have enough money to go out");   
} else {
  alert("This isn't Friday. I need to stay home.");
}
index.html 
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>
Sonya Trachsel
Sonya Trachsel
13,674 Points

Hi Ammar, could you mark the best answer if one of us helped to find the solution? Thank you!

2 Answers

Micah Courey
Micah Courey
20,168 Points

The problem is that the conditional statement is using "||" which represents "or" and in order to check if both arguments are true you need to use "&&". Also the last else if should be === not !== because it is Friday but you have no money.

var money = 9;
var today = 'Friday';

if ( money >= 100 && today === 'Friday' ) {
  alert("Time to go to the theater");    
} else if ( money >= 50 && today === 'Friday' ) {
  alert("Time for a movie and dinner");    
} else if ( money > 10 && today === 'Friday' ) {
  alert("Time for a movie");   
} else if ( today === 'Friday' ) {
  alert("It's Friday, but I don't have enough money to go out");   
} else {
  alert("This isn't Friday. I need to stay home.");
}
ammarkhan
.a{fill-rule:evenodd;}techdegree
ammarkhan
Front End Web Development Techdegree Student 21,661 Points

Thanks, but we only needed to fix 'It's Friday, but i don't have enough money to go out'. why we changed other statements?

Micah Courey
Micah Courey
20,168 Points

The reason we need to change the other statements is because the way it is originally set up it will never reach "It's Friday, but I don't have enough money to go out" because first it checks the first if statement. 

if ( money >= 100 || today === 'Friday' ) {
  alert("Time to go to the theater");    
}

This statement will pass and return the alert because it is saying "if I have at least $100 or its Friday alert 'time to go to the theater'". since it is in fact Friday this statement passes so it can not reach the following "else if" statements. The same goes for the following 2 "else if" statements because it uses "||" which states that 1 of the 2 conditions needs to be true for the statement to pass. For the program to function correctly the first 3 statements need to use the "&&" which means "and" to require that both arguments pass rather than the "||" which means "or" and requires only one of the arguments to pass. I hope that helps.

Sonya Trachsel
Sonya Trachsel
13,674 Points
Sonya Trachsel
Sonya Trachsel
13,674 Points

Hi Ammar,

You need to put a semicolon after 'Friday':

var today = 'Friday';

ammarkhan
.a{fill-rule:evenodd;}techdegree
ammarkhan
Front End Web Development Techdegree Student 21,661 Points

OMG, how can i be so blind. I am laughing on my stupidity right now.