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JavaScript JavaScript Basics Making Decisions in Your Code with Conditional Statements Introducing Conditional Statements

Paula Simon
Paula Simon
Front End Web Development Techdegree Student 8,056 Points

How can I better understand when to use to.UpperCase vs to.LowerCase on conditional statements?

Hello! I am learning about conditional statements in JavaScript. For this video, Guil uses to.UpperCase for the answer "Mercury". Since it works with both "MERCURY" and "mercury" as answers, why/when would it be appropriate to use to.UpperCase vs. to.LowerCase?


2 Answers

Sean Paulson
Sean Paulson
5,406 Points

toLowerCase and toUpperCase just return the text to lower or upper case.

say for example you want to end a program if a user types "quit". Well that user could enter "Quit", "qUiT", QUIt" or any other input. So you want to force that input to be lower case because your string you are testing against is lower case.

If you are comparing your user input to a upper case string you would force the user input to be uper case with toUpperCase.

Thats why the example you gave works either way because no matter what the input is toUpperCase will force it to be upper case.