Basic Input and Output Operation

System.out.println();

Outputs the text followed by a — moves to the next line.

System.out.print();

Outputs the text without adding a newline, meaning the next output will continue on the same line.

System.out.println();
System.out.print();

Output Operations

public class Main{
    public static void main(String[] args){
        System.out.print("wiw umaga na. ");
        System.out.println("ows taalaga ba");
        System.out.println("imissu<3");
    }
}

OUTPUT:
wiw umaga na. ows taalaga ba
imissu<3

Example of output operations

%d
%f
%s
%n

Common format specifiers

%d

Integer

%f

Floating point number

%s

String

%n

Newline

public class Main{
    public static void main(String[] args){
        
        int eyj = 19;
        double grade =  89.56;
        String misij = "unsint a misij";
        
        System.out.printf("age %d years", eyj);
        System.out.printf("grade: %.3f gew \n", grade);
        System.out.printf("misij: %s hihi %n", misij);
        System.out.print("yihi");
    }
}

OUTPUT:
age 19 yearsgrade: 89.560 gew
misij: unsint a misij hihi
yihi

Example of output operations using different format specifiers.

java.util package

To read input, you first need to import the Scanner class from the ________.

import java.util.Scanner;

public class Main{
	public static void main(String[] args){
	Scanner scanner = new Scanner (System.in);	

}
}

Example code of the Using Scanner.

nextInt()
nextDouble()
nextLine()
next()

Common input methods of scanner

nextInt()

Reads an integer.

nextDouble()

Reads a double value.

nextLine()

Reads a string line.

next()

Reads a single word up to the next whitespace.

import java.util.Scanner;

public class Main {   

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter your full name: ");
        String name = sc.nextLine(); 
        System.out.print("Enter your Section: ");
        String section = sc.nextLine(); 
        
        System.out.print("Enter your age: ");
        int age = sc.nextInt(); 

        System.out.print("Enter you 1st sem GWA: ");
        double gwa = sc.nextDouble(); 
	  
	System.out.println();
        System.out.println("Name: " + name);
        System.out.println("Section: " + section);
        System.out.println("Age: " + age);
        System.out.println("1st Sem General Weighted Average: " + gwa);
    }
}

OUTPUT:
Enter your full name: Jes
Enter your Section: CS12S4
Enter your age: 19
Enter you 1st sem GWA: 1.81

Name: Jes
Section: CS12S4
Age: 19
1st Sem General Weighted Average: 1.81

Example of scanner input