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JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Introducing Conditional Statements

kabirdas
kabirdas
1,976 Points
Posted by kabirdas
kabirdas
1,976 Points

what if the user types in "ruby" instead of "Ruby?" how do we account for that?

what would the code be for that? is this covered in later lessons?

4 Answers

Viktor Karatov
Viktor Karatov
4,087 Points

use str.toLowerCase() === 'ruby' You'll always have it in lower case no matter what user has entered.

Theo VOGLIMACCI
Theo VOGLIMACCI
8,027 Points
Theo VOGLIMACCI
Theo VOGLIMACCI
8,027 Points

Hello,

var answer = prompt ('What programming language is the name of a gem?');
if( str.toLowerCase(answer) === 'ruby === 'ruby' ) {
  document.write("<p>That's right!</p>");
} else {
  document.write("<p>That's wrong...</p>");
}

don't work, how should i code it?

Alexander La Bianca
Alexander La Bianca
15,959 Points
Alexander La Bianca
Alexander La Bianca
15,959 Points

There is a way to account for it using conditional statements and utilize the following String methods: charAt() and replace()

Lets say you have the following scenario:

string language = prompt("Enter Ruby");
while(language.chartAt(0) === "r") {                    //a while loop will loop as long the condition between ( ) is true.
    language = prompt("Please use upper case 'R'");
}

In the above example you initially ask the user to enter "Ruby". But if the user enters 'ruby' he/she will be asked again to enter it correctly until it is correct.

A better way to go about it is to include logic to replace the lower case 'r' with an upper case 'R'

string language = prompt("Enter Ruby")
if(language.charAt(0) === "r") {
   language.replace("r", "R");           //replace(stringToReplace, newString) to replace the lower case 'r' with 'R'
}

Hope this helps. http://www.w3schools.com/jsref/jsref_replace.asp - read about the replace method http://www.w3schools.com/jsref/jsref_charat.asp - read about the charAt method

Rex Orioko
Rex Orioko
3,234 Points
Rex Orioko
Rex Orioko
3,234 Points

Theo VOGLIMACCI your declared variable and the one in your If statement don't match, change the str to answer or answer to str, make sure they are the same and it should work, hope that helps