1) formal and polite (ends with ㅂ니다)

안녕하십니까, 저는 (Your name)입니다.

2) informal and polite (ends with 요)

안녕하세요, 저는 (Your name)예요.

3) informal and not polite

안녕, 난 (Your name)야.

4) 안녕하세요, (Your name)이라고 합니다.

There are many ways to introduce yourself in Korean. 

 

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