For Loop

for-loop.js

for(var i = 0; i < 5; i++) {
  /* 
    will execute 5 times
    since i < 5 is true for 5 times
  */
}

// if initializer is already initialized, no need to initialize;

var j = 0;

for(; j < 6; j++) {
  /*
    will execute 6 times
    since j < 6 is true for 5 times
  */
}