jquery - FOR IF Loop in javascript -

I have a simple question I want to make a statement in this code ( if (i = 2) { Str + = 'test';} ):

  var data = feedback information; Var str = '& lt; Ul & gt; '; (Var I = 0; I & lt; data. Lamps; I ++) {str + = '& lt; Li & gt; & Lt; A href = "# blog? Blog_id = '+ data [i] [0] +'" data-transition = "slide" & gt; '+ Data [i] [1] +' & lt; / A & gt; & Lt; / Li & gt; '; If (I = 2) {str + = 'test';}} str + = '& lt; / Ul & gt; '; $ ('#product') HTML (STR) }   
 When I do this, it places the word 'test' on line, not just line 2.   
 
 
 To compare two values,  ==  or  = ==  Use:  
  if (I === 2) {str + = 'test';}   
  The result of> I = 2 , which changes the value of  i , is  2 , which is correct as  if  Evaluates.