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シリーズ: JavaScript javascript 12 行 · 更新日 2026-02-03

exercise3.js

JavaScript/modules/module1-foundations/code-examples/lesson2/exercise3.js

// Exercise 3: Type Conversion
let age = 25;
let ageString = String(age);
console.log("Age as string:", ageString, typeof ageString);

let score = "95";
let scoreNumber = Number(score);
console.log("Score as number:", scoreNumber, typeof scoreNumber);

let isActive = "true";
let isActiveBoolean = Boolean(isActive);
console.log("Active as boolean:", isActiveBoolean, typeof isActiveBoolean);

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