2̓R[hꗗ

LESSON 04@ϐƒ萔ĉH

SECTION 2@ϐĂ݂悤

ϐupricevɁu1000v

function useLet() {
  let price = 1000;
  console.log(price);
}

ϐupricevɁu1000vāǍu1200vɕύX

function useLet() {
  let price = 1000;
  console.log(price);
  price = 1200;
  console.log(price);
}

SECTION 3@萔gĂ݂悤

萔utaxRatevɁu1.10v

function useConst() {
  const taxRate = 1.10;
  console.log(taxRate);
}

萔utaxRatevɁu1.10vāǍu1.08vɕύX

function useConst() {
  const taxRate = 1.10;
  console.log(taxRate);
  taxRate = 1.08;
}

G[o܂B

LESSON 05@f[^^wڂ

SECTION 2@vZӂȁul^v

萔upricevɁu2000vA萔utaxRatevɁu1.10v

function useNumber() {
  const price = 2000;
  const taxRate = 1.10;
}

l̊|Z

function useNumber() {
  const price = 2000;
  const taxRate = 1.10;
  console.log(price * taxRate);
}

SECTION 3@Ȃu^v

ϐuuserNamevɁu؁v

function useString() {
  const userName = '';
  console.log('ɂ́I');
  console.log(userName);
}

SECTION 4@u͂vuv́u^U^v

ϐuisSunnyvɁutruevAϐuisRainyvɁufalsev

function useBoolean() {
  let isSunny = true;
  let isRainy = false;
  console.log(isSunny);
  console.log(isRainy);
}

LESSON 6@Z̊{wڂ

SECTION 1@f[^vZErĂ݂悤

ϐuxvɁu10vAϐuyvɁu5vČvZ

function useCalc() {
  const x = 10;
  const y = 5;
  console.log(x + y);
  console.log(x - y);
  console.log(x * y);
  console.log(x / y);
}

103ŊƂ̗]ƁA34\

function useRemainderAndPower() {
  console.log(10 % 3);
  console.log(3 ** 4);
}

SECTION 3@ϐ̒gւ悤

ϐuscorevɁu50vāA10𑫂

function updateVariable() {
  let score = 50;
  score = score + 10;
  console.log(score);
}

ϐuscorevɁu50vāA10𑫂

function updateVariableWithShortcut() {
  let score = 50;
  score += 10;
  console.log(score);
}

SECTION 4@rZqŔr悤

rʂ̐^U\

function useComparison() {
  const age = 20;
  console.log(age > 18);
  console.log(age < 18);
  console.log(age >= 20);
}

rʂ̐^U\

function useEquality() {
  const age = 20;
  console.log(age === 20);
  console.log(age !== 18);
}

SECTION 5@uvu܂́vuł͂Ȃv\u_Zqv

function useAndOrNot() {
  const age = 25;
  const isStudent = true;
  console.log(age >= 20 && isStudent === true);
  console.log(age < 18 || isStudent === true);
  console.log(!isStudent); // false
}
