// Primitive = oddiy qiymat, to‘g‘ridan-to‘g‘ri xotirada (stack) saqlanadi
// Reference = xotiradagi manzil (stack), u esa heap dagi obyektga ishora qiladi
// 🧠 Primitive vs 🧠 Reference
// int string
// double array
// char object
// boolean
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String item;
double price;
int quantitiy;
char currency = '$';
double total;
System.out.print("What item would you like to buy?: ");
item = scanner.nextLine();
System.out.print("What is the price for each?: ");
price = scanner.nextDouble();
System.out.print("How many would you like?: ");
quantitiy = scanner.nextInt();
total = price * quantitiy;
System.out.println("\nYou have bought " + quantitiy + " " + item + "/s");
System.out.println("Your total is " + currency + total);
scanner.close();
}
}
if (age >= 0 && age <= 18) {
alert("You are a kid, get your passport and learn something!");
} else if (age >= 19 && age <= 50) {
alert("You should work!");
} else if (age >= 51 && age <= 59) {
alert("You will retire soon!");
} else if (age >= 60 && age <= 150) {
alert("You are likely a pensioner, if you are still alive...");
} else if (age > 150) {
alert("Are you even human? ");
} else {
alert("Something went wrong!");
}Difference between JS , C codes same syntax same Values
int main() {
int age;
printf("Enter your age: ");
scanf("%d", &age);
if (age > 0 && age <= 18) {
printf("You are a kid, get your pass up and learn something!\n");
} else if (age > 19 && age <= 50) {
printf("You are ought to work!\n");
} else if (age > 51 && age <= 59) {
printf("You will get retired soon!\n");
} else if (age > 60 && age <= 150) {
printf("You are likely to be pensioner, if you are still alive...\n");
} else if (age > 151) {
printf("You are alive?\n");
} else {
printf("Something went wrong!\n");
}
return 0;
Difference between JavaScript, C, Java codes same syntax same Values!
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int age;
System.out.print("Enter your age: ");
age = scanner.nextInt();
if (age >= 65) {
System.out.println("You are a senior! ");
}else if (age >= 18) {
System.out.println("You are an adult! ");
} else if (age < 0) {
System.out.println("You haven't been born yet! ");
} else if (age == 0) {
System.out.println("You are a baby! ");
} else {
System.out.println("You are a child! ");
}
scanner.close();
}
}
if (age >= 0 && age <= 18) {
alert("You are a kid, get your passport and learn something!");
} else if (age >= 19 && age <= 50) {
alert("You should work!");
} else if (age >= 51 && age <= 59) {
alert("You will retire soon!");
} else if (age >= 60 && age <= 150) {
alert("You are likely a pensioner, if you are still alive...");
} else if (age > 150) {
alert("Are you even human? ");
} else {
alert("Something went wrong!");
}import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String name;
int age;
boolean isStudent;
System.out.print("Enter your name: ");
name = scanner.nextLine();
System.out.print("Enter your age: ");
age = scanner.nextInt();
System.out.print("Are you a student (true/false): ");
isStudent = scanner.nextBoolean();
//GROUP 1
if (name.isEmpty()){
System.out.println("You didn't enter your name! ");
}else {
System.out.println("Hello " + name + "!");
}
//GROUP 2
if (age >= 65) {
System.out.println("You are a senior! ");
}else if (age >= 18) {
System.out.println("You are an adult! ");
} else if (age < 0) {
System.out.println("You haven't been born yet! ");
} else if (age == 0) {
System.out.println("You are a baby! ");
} else {
System.out.println("You are a child! ");
}
//GROUP 3
if (isStudent) {
System.out.println("You are a student! ");
}else {
System.out.println("You are a NOT a student! ");
}
scanner.close();
}
}
import java.util.Random;
public class Main {
public static void main(String[] args) {
Random random = new Random();
boolean isHeads;
isHeads = random.nextBoolean();
if (isHeads) {
System.out.println("Heads");
}else {
System.out.println("Tails");
}
}
}
public class Main {
public static void main(String[] args) {
double result;
result = Math.pow(2, 5);
result = Math.abs(-5);
result = Math.sqrt(9);
result = Math.round(3.14);
result = Math.ceil(3.14);
result = Math.floor(3.99);
result = Math.max(10, 20);
result = Math.min(10, 20);
System.out.println(result);
}
}public class Main {
public static void main(String[] args) {
double result;
result = Math.pow(2, 5); // 2 ni 5-darajaga ko‘tar degani 2 ni 5 martta ko'paytiradi degani
result = Math.abs(-5); // Manfiy sonni musbat qilib beradi -5 -> 5
result = Math.sqrt(9); // Kvadrat ildizini top 9 ning ildizi -> 3
result = Math.round(3.14); // oddiy yaxlitlash 3.14 -> 4 ni butun qilib qaytaradi
result = Math.ceil(3.14); // yuqoriga yaxlitlaydi 3.14 -> 4
result = Math.floor(3.99); // pastga yaxlitlaydi 3.99 -> 3
result = Math.max(10, 20); // Ikkita sondan kattasini oladi
result = Math.min(10, 20); // Ikkita sondan kichkinasini oladi
System.out.println(result);
}
}import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// HYPOTENUSE c = Math.sqrt(a + b);
Scanner scanner = new Scanner(System.in);
double a;
double b;
double c;
System.out.print("Enter the length of side A: ");
a = scanner.nextDouble();
System.out.print("Enter the length of side B: ");
b = scanner.nextDouble();
c = Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2));
System.out.println("The hypotenuse (side c) is: " + c + " cm" );
scanner.close();
}
}
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double radius;
double circumference;
double area;
double volume;
System.out.print("Enter the radius: ");
radius = scanner.nextDouble();
circumference = 2 * Math.PI * radius;
area = Math.pow(radius, 2);
volume = (4.0 / 3.0) * Math.PI * Math.pow(radius, 3);
System.out.printf("The circumference is: %.1fcm\n", circumference);
System.out.printf("The area is: %.1fcm²\n", area);
System.out.printf("The volume is: %.1fcm³\n", volume);
scanner.close();
}
}
public class Main {
public static void main(String[] args) {
// printf() = is a method used to format output
// %[flags][width][precision][specifier-character]
String name = "Spongebob";
char firstLetter = 'S';
int age = 30;
double height = 60.5;
boolean isEmployed = true;
System.out.printf("Hello %s\n", name );
System.out.printf("Your name starts with a %c\n", firstLetter);
System.out.printf("You are %d years old\n", age);
System.out.printf("You are %f inches tall\n", height);
System.out.printf("Emloyed: %b\n", isEmployed);
System.out.printf("%s is %d years old", name, age);
}
}Forwarded from Webstrom_Tech Family🔥
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// Compound interest calculator
Scanner scanner = new Scanner(System.in);
double principal;
double rate;
int timesCompounded;
int years;
double amount;
System.out.print("Enter the principal amount: ");
principal = scanner.nextDouble();
System.out.print("Enter the interest rate (in %): ");
rate = scanner.nextDouble() / 100;
System.out.print("Enter the # of times compounded per years: ");
timesCompounded = scanner.nextInt();
System.out.print("Enter the # of years: ");
years = scanner.nextInt();
amount = principal * Math.pow(1 + rate / timesCompounded, timesCompounded * years);
System.out.printf("The amount after %d years is $%.2f", years, amount);
scanner.close();
}
}
public class Main {
public static void main(String[] args) {
String name = "Password";
// int length = name.length();
// char letter = name.charAt(0);
// int index = name.indexOf(" ");
// int lastIndex = name.lastIndexOf("o");
// name = name.toUpperCase();
// name = name.toUpperCase();
// name = name.trim();
// name = name.replace("o", "a");
// if(name.isEmpty()) {
// System.out.println("Your name is Empty");
// }else {
//
// System.out.println(" Hello" + name);
// }
// if(name.contains(" ")) {
//
// System.out.println("Your name contains a space");
// }else {
// System.out.println("Your name doesn't contain any spaces");
// }
if (name.equalsIgnoreCase("password")) {
System.out.println("Your name can't be password");
}else {
System.out.println("Hello " + name);
}
}
}public class Main {
public static void main(String[] args) {
String txt = "Hello World";
System.out.println(txt.toUpperCase()); // HELLO WORLD
System.out.println(txt.toLowerCase()); // hello world
System.out.println(txt.length()); // 11
String text = "Please locate where locate occurs";
System.out.println(text.indexOf("locate")); // 7
String sample = "Hello";
System.out.println(sample.charAt(0)); // H
System.out.println(sample.charAt(4)); // o
String a = "Hello";
String b = "Hello";
System.out.println(a.equals(b)); // true
System.out.println(a.equalsIgnoreCase(b)); // true
String lyrc = " Hello World ";
System.out.println(lyrc.trim());
String txt1 = "Java is hard";
System.out.println(txt1.replace("hard", "easy"));
String txt2 = "backendDeveloper";
System.out.println(txt2.startsWith("back")); // true
System.out.println(txt2.endsWith("per")); // true
String txt3 = "";
System.out.println(txt3.isEmpty()); // true
String txt4 = "Microservice";
System.out.println(txt4.substring(0, 6)); // Micros
}
}import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// .substring() = A mehtod used to extract a portion of a string
// string.substring(start, end)
// .Substring() - method olib tashlaydi (0, 6) nishonovafotima24@gmail.com -> nishon
Scanner scanner = new Scanner(System.in);
String email;
String username;
String domain;
System.out.println("Enter your email: ");
email = scanner.nextLine();
if (email.contains("@")) {
username = email.substring(0, email.indexOf("@"));
domain = email.substring(email.indexOf("@") + 1);
System.out.println(username);
System.out.println(domain);
}else {
System.out.println("Emails must contains @");
}
scanner.close();
}
}