beginner
13 min read
Build a JavaScript Quiz App
You've learned arrays, conditionals, click events, and DOM updates as separate lessons. Now it's time to see them work together. A quiz app is the perfect…
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Program Control Flow
Controlling which instructions run and how often through conditions, boolean evaluation, iteration, and related flow patterns.
Tagged articles
Program Control Flow articles
9 articles in this tag.
beginner
14 min read
Build a Number Guessing Game
You've clicked buttons. You've added items to a list. Now it's time to make JavaScript think.
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beginner
9 min read
for Loops vs forEach vs map in JavaScript
You can loop over an array three different ways, and they all look nearly identical when you write them. So which one should you use?
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beginner
9 min read
Recursion in JavaScript: Base Cases and Step-by-Step Tracing
That is the normal first experience with recursion. The function calls itself, the answer appears, and somewhere in the middle your mental model goes dark.…
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beginner
8 min read
JavaScript Truthiness: Falsy Values and Conditional Checks
A condition does not ask whether a value is true. It asks what that value becomes when JavaScript forces it into a yes-or-no decision.
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beginner
11 min read
Loops: for and while
Five console.log statements will print five numbers. Fifty will print fifty. Five hundred will print five hundred—if you have the patience to write them…
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beginner
8 min read
Making Decisions with if/else
Every program you write has to react to the world around it. A login form needs to say "Welcome back" to one person and "Invalid password" to another. A…
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beginner
12 min read
JavaScript if/else and Boolean Practice Exercises
You can write an if/else statement. You know where the braces go and what console.log does. But when the condition gets even slightly tricky, you hesitate.…
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beginner
8 min read
Work with Multiple DOM Elements in JavaScript
You learned to select one button and make it respond to a click. Then your page grew five buttons that all need the same behavior—and your trusty…
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