stuck

Please take a look in a video once more, the way Craig inputs variables.

You declare variable using Type VariableName syntax:

String name;

Your code

name= "niranjan";

will work only with declaration above:

String name;
name= "niranjan";

Most of the methods in java are called like : methodName(argument) or many arguments

console.printf readLine= ("what is your name?");

This is not call of the method console.printf readline ...

You have to do this:

console.readLine();

As argument to readLine method, you put phrase that will be printed before you type your input from keyboard:

console.readLine("Please enter a word: ");

I will help you with the first task to get started.

So, you first declare a variable called name

String name;

Second, you store user input in that variable. In order to do that you have to know that console.readLine() returns whatever user types...And in order to store that in our name variable we have to use equal:

name = console.readLine("Please type your name: ");

One can also combine declaration and assignment:

String name = console.readLine("Please type your name: ");

That will solve first task of challenge. Please re-watch lecture videos, and google about java as well, if things are not clear...