Dart – Standard Input Output
Standard Input in Dart:
In Dart programming language, you can take standard input from the user through the console via the use of .readLineSync() function. To take input from the console you need to import a library, named dart:io from libraries of Dart.
About Stdin Class:
This class allows the user to read data from standard input in both synchronous and asynchronous ways. The method readLineSync() is one of the methods used to take input from the user. Refer to the official doc for other methods, from here.
Taking a string input from user:
Enter your name? Hello, Geek! Welcome to GeeksforGeeks!!
Taking integer value as input:
Enter your favourite number: Your favourite number is 1
Standard Output in Dart:
In dart, there are two ways to display output in the console:
- Using print statement.
- Using stdout.write() statement.
Printing Output in two different ways:
Welcome to GeeksforGeeks! // printing from print statement Welcome to GeeksforGeeks! // printing from stdout.write()
The print() statement brings the cursor to next line while stdout.write() don’t bring the cursor to the next line, it remains in the same line.
If the print statements are switched in the above program then:
Welcome to GeeksforGeeks! // printing from stdout.write()Welcome to GeeksforGeeks! // printing from print statement
Making a simple addition program:
-----------GeeksForGeeks----------- Enter first number Enter second number Sum is 23