how work while in javascript code example

Example 1: javascript while

var i=0;
while (i < 10) {
	console.log(i);
	i++;
}
//Alternatively, You could  break out of a loop like so:
var i=0;
while(true){
	i++;
	if(i===3){
		break;
	}
}

Example 2: while javascript

do {

    text += "The number is " + i;

    i++;

 }

while (i < 10);