자바의 조건문

조건문이란?

조건문(Conditional) 은 선언된 조건에 맞는 경우에만 실행되는 코드를 말한다.

If 문

String today = "sat";

if (today == "sat") {
    System.out.println("In my home");
}

Else if 문

String today = "sun";
String tomorrow = "mon";

if (today == "sun") {
    System.out.println("In my home");
} else if (tomorrow == "mon") {
    System.out.println("Go to work");
}

Else 문

String weekend = "weekend";
String weekday = "weekday";

if (weekend == "weekend") {
    System.out.println("In my home");
} else {
    System.out.println("Go to work");    
}

Switch 문

String day;

switch (day) {
    case "mon": System.out.println("Go to work");
    case "tue": System.out.println("Go to work");    
    case "wed": System.out.println("Go to work");    
    case "thu": System.out.println("Go to work");    
    case "fri": System.out.println("Go to work");    
    case "sat":    System.out.println("In my home");
    case "sun":    System.out.println("In my home");
}

Ternary Operator (삼항 연산자)

int three = 3;
String numberIs = (three % 2 == 0) ? "even" : "odd";
Syttem.out.println(numberIs);

Resources

• https://roadmap.sh/java
• https://www.educative.io/answers/what-are-conditional-statements-in-programming
• https://www.javatpoint.com/java-if-else