Javascript Part2

array_push

if/else结构

score if-else练习

let score = prompt("Please enter your score");
if (score >= 90) {
    console.log("A");
} else if (score >= 80) {
    console.log("B");
} else if (score >= 70) {
    console.log("C");
} else if (score >= 60) {
    console.log("D");
} else {
    console.log("E");
}