Step by Step solution about How to resolve the algorithm Input loop step by step in the JavaScript programming language

This JavaScript code reads lines of text from the standard input stream and prints them to the standard output stream, prefixing each line with a line number.

The code uses the WScript object, which is available in Windows Script Host (WSH), to access the standard input and output streams.

The WScript.StdIn property returns a TextStream object that represents the standard input stream. The TextStream object has a ReadLine() method that reads a single line of text from the stream.

The WScript.echo() method prints a string to the standard output stream.

The code uses a while loop to read lines of text from the standard input stream until the end of the stream is reached. The AtEndOfStream property of the TextStream object returns true if the end of the stream has been reached.

For each line of text that is read, the code increments the line number and prints the line number and the line of text to the standard output stream.

var text_stream = WScript.StdIn;
var i = 0;

while ( ! text_stream.AtEndOfStream ) {
    var line = text_stream.ReadLine();
    // do something with line
    WScript.echo(++i + ": " + line);
}