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Replace "for" with "while"

importance: 5

Rewrite the code changing the for loop to while without altering its behavior (the output should stay same).

for (let i = 0; i < 3; i++) {
  alert( `number ${i}!` );
}
let i = 0;
while (i < 3) {
  alert( `number ${i}!` );
  i++;
}