Hayotiy misollar

Hayotiy misollar

Ushbu misol foydalanuvchi to‘g‘ri kodni kiritganda "eshikni ochish" uchun if..else operatoridan qanday foydalanish mumkinligini ko‘rsatadi:

int doorCode = 1337;

if (doorCode == 1337) {
  System.out.println("Correct code. The door is now open.");
} else {
  System.out.println("Wrong code. The door remains closed.");
}

Ushbu misol sonning musbat yoki manfiy ekanligini aniqlash uchun if..else operatoridan qanday foydalanish mumkinligini ko‘rsatadi:

int myNum = 10; // Is this a positive or negative number?

if (myNum > 0) {
  System.out.println("The value is a positive number.");
} else if (myNum < 0) {
  System.out.println("The value is a negative number.");
} else {
  System.out.println("The value is 0.");
}

Insonning ovoz berish uchun yoshi yetarli ekanligini aniqlang:

int myAge = 25;
int votingAge = 18;

if (myAge >= votingAge) {
  System.out.println("Old enough to vote!");
} else {
  System.out.println("Not old enough to vote.");
}

Insonning ovoz berish uchun yoshi yetarliligini va u fuqaro ekanligini aniqlang (ichma-ich if operatorlari yordamida):

int age = 20;
boolean isCitizen = true;

if (age >= 18) {
  System.out.println("Old enough to vote.");
  
  if (isCitizen) {
    System.out.println("And you are a citizen, so you can vote!");
  } else {
    System.out.println("But you must be a citizen to vote.");
  }
} else {
  System.out.println("Not old enough to vote.");
}

Sonning juft yoki toq ekanligini aniqlang:

int myNum = 5;

if (myNum % 2 == 0) {
  System.out.println(myNum + " is even");
} else {
  System.out.println(myNum + " is odd");
} 

Haroratni tekshiring:

int temperature = 30;

if (temperature < 0) {
  System.out.println("It's freezing!");
} else if (temperature < 20) {
  System.out.println("It's cool.");
} else {
  System.out.println("It's warm.");
} 

Tizimga kirishni nazorat qilish misoli — kirish huquqini olish uchun tizimga kirgan bo‘lishingiz, so‘ngra administrator bo‘lishingiz yoki yuqori xavfsizlik ruxsatiga (1- yoki 2-daraja) ega bo‘lishingiz kerak:

boolean isLoggedIn = true;
boolean isAdmin = false;
int securityLevel = 3; // 1 = highest

if (isLoggedIn && (isAdmin || securityLevel <= 2)) {
  System.out.println("Access granted");
} else {
  System.out.println("Access denied");
}

// Try changing securityLevel to test different outcomes:
//
// securityLevel 1 = Access granted
// securityLevel 2 = Access granted
// securityLevel 3 = Access denied
// securityLevel 4 = Access denied
//
// If isAdmin = true, access is granted.