‘use strict‘;

var height = parseFloat(prompt(‘请输入身高(m):‘));
var weight = parseFloat(prompt(‘请输入体重(kg):‘));

var bmi = weight/(height*height);
console.log(`您现在的BMI值为：${bmi}`);
if(bmi<=18.5){
    alert(‘过轻‘);
}else if(18.5<bmi<=25){
    alert(‘正常‘);
}else if(25<bmi<=28){
    alert(‘过重‘);
}else if(28<bmi<=32){
    alert(‘肥胖‘);
}
else{
    alert(‘严重肥胖‘);
}

JS练习_BMI值预测