[Javascript]繰り返し処理(while, for)

while

while (条件式) {
処理
}

let number = 1;

while (number < 10) {
  console.log(number);
  number += 1;
}

for

for (変数定義;条件式;変数の更新) {
処理
}

for (let number = 1; number < 10; number += 1) {
  console.log(number);
}

if文との組み合わせ

for (let number = 1; number < 10; number += 1) {
  if (number % 2 === 0) {
    console.log("2の倍数です");
  } else {
    console.log(number);
  }
}