python

name = '123'

age = 23

print(f '姓名： {name}')

JS
<script>
window.alert(`你好，${name}!`)
document.write(`<h1>你好，${name}!</h1>`)

typeof
     #判斷類型
     #JavaScript中還可以使用const關(guān)鍵字定義常量
     //JavaScript中定義變量可以使用var或let關(guān)鍵字
    //變量的命名跟python的變量命名規(guī)則相同,除了可以使用$
    //變量可以大致分為基本數(shù)據(jù)類型和對象類型(object)兩大類
    //基本數(shù)據(jù)類型包括:number boolean string null undefined symbol
    //用typeof 判斷數(shù)據(jù)類型
    //JavaScript中還可以使用const關(guān)鍵字定義常量
    //算術(shù)運算: +-*/  % **
    //比較運算: == != > < >= <= === !==
    //邏輯運算: && (and)　||(or) !(not)
    let stu = {name:'zeng', age:23}
    stu.name
    "zeng"
    stu.age
    23

    let name = prompt('請輸入你的名字：')
            if (!!name && name.trim() != '') {
                alert(`你好, ${name}`)
            } else {
                alert('大家好！')
            }


let year = parseInt(prompt('請輸入年份：'))
            if (year%4 == 0 && year%100 != 0 || year % 400 == 0) {
                alert(`${year}是閏年`)
            } else {
                alert('不是閏年')
            }
let year = parseInt(prompt('請輸入年份：'))
            let isLeap = year%4 == 0 && year%100 != 0 
                || year % 400 == 0          
            alert(`${year}年${isLeap?'是':'不是'}閏年`)

#for循環(huán)
            let total = 0
            for (let i = 1; i <= 100; i += 1) {
                total += i
            }
            document.write(total)
            
#while循環(huán)    
            let total = 0
            i = 1
            while (i <= 100) {
                total += i
                i += 1
            }
            document.write(total)
#do while循環(huán)         
            let total = 0
            i = 1
            do {
                total += i
                i += 1
            } while (i <= 100)
            document.write(total)
</script>

            // 變量數(shù)組元素
            let nums = [1, 2, 3, 4, 5]
            // for (let idx = 0; idx < nums.length; idx += 1) {
            //  alert(nums[idx])
            // }
            for (num of nums) {
                alert(num)
            }
            
            // 遍歷對象屬性
            let stu = {
                name: 'Z',
                age:44,
                sex:'男',
                friends:['h', 'y'],
                car: {
                    'brand': 'QQ',
                    'maxSpeed':'55'
                }
            }
            for (prop in stu) {
                alert(stu[prop])
            }

乘法表

      for ( let i = 1; i <= 9; i += 1) {
                document.write('<p>')
                for (let j = 1; j <= i; j += 1) {
                    document.write(`${i}&times;${j}=${i * j}&nbsp;&nbsp;`)
                }
                document.write('</p>')
            }