while loop in JavaScript:

The while loop iterates through a block of code until specified condition gets false. Here is example of while loop in JavaScript as bellow:

//Syntax:

while (condition)
  {
  code block to be executed
  }
  
//Example:

var x=0,i=0;
while(i<=5)
  {
  x=x +  i;
      i++;
  }
alert(x);