Question

I am trying to create table in java by taking in user input. So for the three the table should look like:

I am looking for any idea on how to go about doing this – may be just pseudo code would be helpful I can fill in the blanks. Thank you for your help 🙂

Answer 1

Here is Javascript code to do what you want:

var input = 3; // Read 3 from user
var lines = 1 << input;
var i, j;

for(i = 0; i < lines; i++){
    var str = "";
    for(j = input - 1; j >= 0; j--){
        if(i & 1 << j)
             str += "1";
        else
             str += "0";
    }
    document.write(str + "<br />");
} 

Here it is working: http://jsfiddle.net/uqP3M/

I won’t give you Java code since this is probably homework and you should try to understand it while converting it to Java. If you are unsure of the << operator. Just know that (1 << x) means 2 to the power of x. That should help you understand it.