Dart:math

To print a string to console without a trailing new line in Dart, import dart:io library, and call stdout. write() function with the string passed as argument to it .

Stdin allows both synchronous and asynchronous reads from the standard input stream . Mixing synchronous and asynchronous reads is undefined.

An IOSink connected to either the standard out or error of the process. Provides a blocking IOSink , so using it to write will block until the output is written. In some situations this blocking behavior is undesirable as it does not provide the same non-blocking behavior that dart:io in general exposes.

Here’s the code from the dcat program that writes the line number to the stdout (if the -n flag is set) followed by the line from the file. if (showLineNumbers) { stdout . write(‘${lineNumber++} ‘); } stdout. writeln(line);

How to take input in Dart. To take input from a user in Dart, you need to import the dart:io library . The input is taken through the console using the . readLineSync() function.