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JavaScript

Posted by olu adesina
olu adesina
23,007 Points

JavaScript why is this an infinite loop 

(function initLoop() {
  function doLoop(x) {
    i= 3;
    console.log('loop:', x);
  }

  for (var i = 0; i < 10; i++) {
    doLoop(i + 1);
  }
})();

2 Answers

Steven Parker
Steven Parker
243,318 Points
Steven Parker
Steven Parker
243,318 Points

This is the line that makes it an infinite loop:

    i= 3;

The loop creates the variable "i", and attempts to use it to count to 10, but each time it calls the function "doLoop", it is set back to 3. So since "i" never reaches 10, the loop repeats forever.

If you remove that line, it will run 10 times and stop.

Bernardo Bonança
Bernardo Bonança
10,773 Points
Bernardo Bonança
Bernardo Bonança
10,773 Points

In your doLoop function you are setting i = 3 so everytime this runs your iterator gets set back to 3 therefore always being <10