// 1

let input = 3
if (input == 0){
    console.log("0이에요")
} else if ( input < 0){
    console.log("0보다 작아요")
} else if ( input > 0){
    console.log("0보다 커요")
}

//2

let score = 56

if (score <= 59){
    console.log("F")
}else if (score <= 69){
    console.log("D")
}else if (score <= 79){
    console.log("C")
}else if (80 <= score <= 89){
    console.log("B")
}else if (90 <= score <= 100){
    console.log("A")
}

//3

if (skills.includes("Javascript") && skills.includes("React")){
    console.log("합격")
}else if (skills.includes("Javascript") || skills.includes("React")){
    console.log("예비")
}else {
    console.log("탈락")
}