for loop - How to increment a value in Javascript with a value the user defines -

I want to type a loop that displays the numbers from 1-100, which the user chooses.

  var x = Prompt for  <(I = 0; i  
 Why this work does not do?  
 I am reading Javascript myself, and I am trying to understand it.  
 Can anyone help?   
 
 
 You need to purge the x. 
 
  var x = parseInt (prompt (" you want to see increase increments ")); {Document.write (i + "") for (i = 0; i & lt; = 100; i = i + x); }