JavaScript9 min read

JavaScript Number Methods and Math

Master JavaScript number methods and Math object. Learn rounding, parsing, and calculations.

Alex Thompson
Dec 20, 2025
3,573160

JavaScript Number Methods and Math

Number Methods

const num = 123.456;

num.toFixed(2);      // "123.46"
num.toString();      // "123.456"
parseInt('123');     // 123
parseFloat('123.45'); // 123.45

Math Object

Math.max(5, 10);     // 10
Math.min(5, 10);     // 5
Math.round(4.7);     // 5
Math.floor(4.7);     // 4
Math.ceil(4.2);      // 5
Math.random();       // 0 to 1
Math.abs(-5);        // 5
Math.sqrt(16);       // 4
Math.pow(2, 3);      // 8

Key Takeaway

Number methods format numbers. Math object provides calculations. Essential for numeric operations.

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