Category: JavaScript
JavaScript Thousands Separators: Add Commas and Parse Input
Format numbers with locale-aware thousands separators and validate grouped decimal input before converting it. Covers decimal options, string formatting and precision limits.
JavaScript Rounding: Math.floor(), ceil(), round() and trunc()
Compare rounding methods for positive and negative values, round at different positions, and distinguish floating-point arithmetic from toFixed() display formatting.
JavaScript Notes: Number Formatting, URI Encoding and Selectors
Format numbers, choose the right URI encoding function, and build query parameters safely. Includes decoding error handling, CSS selector guidance and a runnable URL example.
JavaScript Loops: while, do...while and for Compared
Compare loop execution order and behavior when the initial condition is false. Learn how break and continue work and avoid infinite loops and index boundary errors.
JavaScript Conditionals: if, else if, else and switch
Choose conditional branches with if and switch, understand strict matching and fall-through, and validate input before comparing numbers. Includes a complete browser example.
JavaScript Number(): Convert Strings and Validate Input
Convert text to numbers while rejecting blank and nonfinite input. Compare Number(), parseInt() and parseFloat(), and account for accepted formats and precision limits.
JavaScript String(): Convert Numbers to Strings
Learn how String() converts values, why string concatenation differs from addition, and when null handling or JSON serialization is needed. Compare primitive strings with new String() objects.