Input and Output

Input

Input refers to the data provided to a program or a function. It can come from various sources like the user through a keyboard, a file, a sensor, or even another program. In programming, handling input involves capturing and processing this data to perform operations or produce output.

C

char userInput[50];
printf("Enter a string: ");
scanf("%s", userInput);
printf("You entered: %s\n", userInput);

C++

string userInput;
cout << "Enter a string: ";
cin >> userInput;
cout << "You entered: " << userInput << endl;

Java

Scanner scanner = new Scanner(System.in);
System.out.print("Enter a string: ");
String userInput = scanner.nextLine();
System.out.println("You entered: " + userInput);

Python

user_input = input("Enter a string: ")
print("You entered: ", user_input)

Output

Output is the result produced by a program after it processes input. It can be displayed on the screen, written to a file, sent over a network, or used as input for another process. Output can take many forms, including text, numbers, images, or any other kind of data.

C

char userInput[50];
printf("Hello, World!\n");

C++

string userInput;
cout << "Hello, World!" << endl;

Java

System.out.println("Hello, World!");

Python

print("Hello, World!")

Pseudocode Example

PRINT "Please enter your name: "  
INPUT user_name  
PRINT "Hello, " + user_name + "! Nice to meet you."