If-statement not working Javascript -

okay, here code.

.ajax({         type:"post",         url: "data.php",         data:{             number:number, sprint_count:sprint_count         },         datatype: 'json',         success: function(data){               var count = data.length;             var plannedsprint = 0;              for(var = 0; i<count; i++){                 var column = data[i].column;                 if(plannedsprint !== data[i].plannedsprint){                      $("#div"+column+"_"+team).append(data[i].plannedsprint);                   }                      var plannedsprint = data[i].plannedsprint;                 var team = data[i].team;                  var element = data[i].element;                   $("#div"+column+"_"+team).append(element);             }         }     }); 

i want if-statement work long data[i].plannedsprint isn't same plannedsprint. reason if-statement isn't working. why so, wrong if-statement?

in mind think should work this:

var plannedsprint = 0; // set 0 if(plannedsprint !== data[i].plannedsprint){ // cause of plannedsprint being set 0 before believe should work cause data[i].plannedsprint wont 0. var plannedsprint = data[i].plannedsprint; // , give plannedsprint new value next loop instead of 0. 

but not working, can explain!

you're redefining variable inside if statement. remove var inside.

var plannedsprint = 0; if(plannedsprint !== data[i].plannedsprint){     plannedspint = data[i].plannedsprint; // no "var" 

i won't enter long description of why occurs, should read on javascript "hoisting" understand behaviour further.