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๐Ÿ“š๊ฐœ๋ฐœ ๋ณต์Šต ๋…ธํŠธ

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๐Ÿ“š๊ฐœ๋ฐœ ๋ณต์Šต ๋…ธํŠธ

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java(37)

  • break์™€ continue

    public class Break01 { public static void main(String[] args) { //๋งŒ์•ฝ์— ๋ฐ˜๋ณต๋ฌธ(for, while) ์•ˆ์— break๊ฐ€ ์‹คํ–‰๋˜๋ฉด //๋ฐ”๋กœ โ˜…๋ฐ˜๋ณต๋ฌธโ˜…์„ ๋ฒ—์–ด๋‚œ๋‹ค. for(int i = 0 ; i < 6 ; i++) { System.out.println(i); if(i == 3) { break; } } } } ์‹คํ–‰๋ฌธ ์œ„์น˜๋ฅผ ๋ฐ”๊ฟ”๋ณด์ž public class Break01 { public static void main(String[] args) { //๋งŒ์•ฝ์— ๋ฐ˜๋ณต๋ฌธ(for, while) ์•ˆ์— break๊ฐ€ ์‹คํ–‰๋˜๋ฉด //๋ฐ”๋กœ โ˜…๋ฐ˜๋ณต๋ฌธโ˜…์„ ๋ฒ—์–ด๋‚œ๋‹ค. for(int i = 0 ; i < 6 ; i++) { if(i == 3) { break; } System.out.p..

    2023.01.19
  • ๋ฐ˜๋ณต๋ฌธ ๋ฌธ์ œ ํ’€๊ธฐ

    public class ๋ฐ˜๋ณต๋ฌธ๋ฌธ์ œ1_1 { public static void main(String[] args) { int n = 0; while(n < 5) { System.out.println("*"); n++; } } } public class ๋ฐ˜๋ณต๋ฌธ๋ฌธ์ œ1_2 { public static void main(String[] args) { for(int i = 0 ; i < 5 ; i++) { System.out.println("*"); } } } public class ๋ฐ˜๋ณต๋ฌธ๋ฌธ์ œ1_3 { public static void main(String[] args) { int num = 0; while(num < 6){ System.out.println(num); num++; } } } public class..

    2023.01.19
  • ๋ฐ˜๋ณต๋ฌธ for

    for๋ฅผ ์“ฐ๋Š” ์ด์œ  while๋ฌธ์€ ์‹คํ–‰๋ฌธ์ด ๊ธธ์–ด์ง€๋ฉด ํŒŒ์•…์ด ๋ถˆํŽธํ•˜๊ธฐ ๋•Œ๋ฌธ์— for ๋ฌธ๋ฒ• : for(์‹œ์ž‘์‹œ์ ์ง€์ •; ๋ฐ˜๋ณต ์กฐ๊ฑด ; ๋ฐ˜๋ณต์„ ์ค‘๋‹จ์‹œํ‚ค๋Š” ์ฝ”๋“œ){ ์‹คํ–‰๋ฌธ; ์‹คํ–‰๋ฌธ; public class For01 { public static void main(String[] args) { //์ˆœ์„œ1 2 4 for(int i = 1; i 2> 3 > 4 ํ›„ 2 > 3> 4์ˆœ์œผ๋กœ ์กฐ๊ฑด์ด ๋งŒ์กฑํ•  ๋•Œ๊นŒ์ง€ ๋ฐ˜๋ณต ์—ฐ์Šต 0๋ถ€ํ„ฐ 10๊นŒ์ง€ ์ถœ๋ ฅํ•ด๋ณด์ž. public class For02 { public static void main(String[] args) { //0๋ถ€ํ„ฐ 10๊นŒ์ง€ ์ถœ..

    2023.01.19
  • ๋ฐ˜๋ณต๋ฌธ while

    while๋ฌธ ๊ธฐ๋ณธ ๋ฌธ๋ฒ• : while(์ฐธ ๊ฑฐ์ง“์„ ํŒ๋‹จํ•  ์ˆ˜ ์žˆ๋Š” ์กฐ๊ฑด { ์‹คํ–‰๋ฌธ; ์‹คํ–‰๋ฌธ; ** ์กฐ๊ฑด์„ ๋น„๊ตํ•˜๊ณ  ๋งž์œผ๋ฉด ์‹คํ–‰ ํ•˜๊ณ  ๋‹ค์‹œ ์กฐ๊ฑด์œผ๋กœ ์˜ฌ๋ผ์˜ด (๋ฐ˜๋ณตํ•จ) >> ์กฐ๊ฑด์ด ๋งž์ง€ ์•Š์„ ๋•Œ๊นŒ์ง€ public class While01 { public static void main(String[] args) { int num = 1; //์‹œ์ž‘ ์ง€์  // while(num < 3) { //๋ฃจํ•œ๋ฃจํ”„ System.out.println("java"); ๋ฌดํ•œ๋Œ€๋กœ ๋ฐ˜๋ณตํ•˜๊ฒŒ ๋จ. num์ด ๊ณ„์† 1์ด๊ธฐ ๋•Œ๋ฌธ์— public class While01 { public static void main(String[] args) { int num = 1; //๋ฐ˜๋ณต์˜ ์‹œ์ž‘ ์‹œ์  ๋ฐ˜๋“œ์‹œ ํ•„์š”. // while(num < 3) { //๋ฐ˜๋ณต..

    2023.01.19
  • ๊ฐ„๋‹จํ•œ ๊ณ„์‚ฐ๊ธฐ๋ฅผ ๋งŒ๋“ค์–ด๋ณด์ž

    ๋ฌธ์ž์—ด๋น„๊ต๋ฌธ์ œ์ž„ public static void main(String[] args) { Scanner sc = new Scanner(System.in); int num1, num2; String oper; //์—ฐ์‚ฐ์ž๋Š” ๋ฌธ์ž์—ด ํƒ€์ž…์œผ๋กœ ์„ ์–ธ System.out.print("์ฒซ๋ฒˆ์งธ ์ˆ˜ : "); num1 = sc.nextInt(); System.out.print("๋‘๋ฒˆ์งธ ์ˆ˜ : "); num2 = sc.nextInt(); System.out.print("์—ฐ์‚ฐ์ž : "); oper = sc.next(); //์—ฐ์‚ฐ์ž์— ๋”ฐ๋ผ ๊ฐ’์„ ๋ฐ›์•„์•ผ ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ๋ฌธ์ž์—ด ๋น„๊ต๋ฅผ ์จ์•ผ ํ•จ. if(oper.equals("+")) { //์ฃผ์˜ ๊ณ„์‚ฐํ•  ๊ฐ’์— ์šฐ์„ ์ˆœ์œ„ ()๋กœ ๋ถ€์—ฌ System.out.println(num1 + " + ..

    2023.01.19
  • ๋ฌธ์ž์—ด ๋น„๊ต

    ๋‚ด๊ฐ€ ์ ์€ ์ฝ”๋“œ์—์„œ ctrl + space ๋ˆ„๋ฅด๋ฉด ์ ์€ ์ฝ”๋“œ์—์„œ ์“ธ ์ˆ˜ ์žˆ๋Š” ๋ชฉ๋ก๋“ค์ด ๋œฌ๋‹ค. ๋ฌธ์ž์—ด์ด ๊ฐ™์€์ง€ ๋น„๊ตํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ๋‹ค๋ฅธ ๋ฌธ๋ฒ• ์‚ฌ์šฉ ๋ฌธ์ž์—ด ๋น„๊ต ๋ฌธ๋ฒ• : ๋น„๊ตํ• ๋ฌธ์ž.equals(๋น„๊ต๋ ๋ฌธ์ž) "java".equals("java"); ๋ฌธ์ž์—ด ๋น„๊ต ๋ฌธ์ œ **๋ฌธ์ œ์™€ ๊ด€๋ จ๋œ if ์ฐธ๊ณ ์‚ฌํ•ญ boolean test3 = 1 ==1; if(test3) { //if๋ฌธ ์•ˆ์— ์กฐ๊ฑด์‹์€ ๋Œ€๋†“๊ณ  true๋‚˜ ๊ฒฐ๊ณผ๋ฅผ ์ฝ์—ˆ์„ ๋•Œ ์ฐธ ๊ฑฐ์ง“์ด ํŒ๋‹จ๋˜๋Š” ๊ฒƒ ๋‹ค ๋“ค์–ด๊ฐˆ ์ˆ˜ ์žˆ๋‹ค. System.out.println(123); import java.util.Scanner; public class ๋ฌธ์ž์—ด๋น„๊ต๋ฌธ์ œ_ํ”„๋ฆฐํŠธ4_1 { public static void main(String[] args) { Scanner sc = new Sc..

    2023.01.19
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