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function great(name: string): string {
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return `안녕하세요, ${name}님!`;
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}
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const add = (a: number, b: number): number => a + b;
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function log(message: string, userId?: number): void {
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console.log(`[${userId ?? "Unknown"}] ${message}`);
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}
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log(add(3, 4).toString());
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log(great("타입스크립트"), 135); |
