diff --git "a/12 \351\231\210\345\215\216\344\274\237/\344\275\234\344\270\232/2022-10-13 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.html" "b/12 \351\231\210\345\215\216\344\274\237/\344\275\234\344\270\232/2022-10-13 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.html" new file mode 100644 index 0000000000000000000000000000000000000000..73ca99afb8348b12802d5f54f4d160ca423c7a44 --- /dev/null +++ "b/12 \351\231\210\345\215\216\344\274\237/\344\275\234\344\270\232/2022-10-13 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.html" @@ -0,0 +1,76 @@ + + + + + + + + + + + + + 标题 + + + +

嗨嗨

+ + + \ No newline at end of file diff --git "a/12 \351\231\210\345\215\216\344\274\237/\344\275\234\344\270\232/2022-10-14 \347\254\254\344\272\214\346\254\241\344\275\234\344\270\232.html" "b/12 \351\231\210\345\215\216\344\274\237/\344\275\234\344\270\232/2022-10-14 \347\254\254\344\272\214\346\254\241\344\275\234\344\270\232.html" new file mode 100644 index 0000000000000000000000000000000000000000..4993d221a083e64257a5c9a1d62d40f96c42a678 --- /dev/null +++ "b/12 \351\231\210\345\215\216\344\274\237/\344\275\234\344\270\232/2022-10-14 \347\254\254\344\272\214\346\254\241\344\275\234\344\270\232.html" @@ -0,0 +1,73 @@ + + + + + + + Document + + + + + + +

1.将A5F3转成2进制

+ +

2.99乘法表

+ +

3.输入年月,(用数组) 3.1.计算当月有多少天 3.2.计算还剩多少天

+ + + + + + + \ No newline at end of file diff --git "a/12 \351\231\210\345\215\216\344\274\237/\347\254\224\350\256\260/2022-10-13 \345\276\252\345\235\217\344\275\223.md" "b/12 \351\231\210\345\215\216\344\274\237/\347\254\224\350\256\260/2022-10-13 \345\276\252\345\235\217\344\275\223.md" new file mode 100644 index 0000000000000000000000000000000000000000..dd1a2e26e529c55c89a506ccd0a1369044ac6f89 --- /dev/null +++ "b/12 \351\231\210\345\215\216\344\274\237/\347\254\224\350\256\260/2022-10-13 \345\276\252\345\235\217\344\275\223.md" @@ -0,0 +1,114 @@ +# 2022-10-13 + +## 循环体 + +```js +在html中嵌套javascript + +var let (声明函数) + +打印在网页 : document.write(); 在网页上打印括号中的值 + +弹窗:alert() 弹窗显示括号中的值 + +弹窗输入 :var name = prompt('请输入一个名字') + +console.log() ---打印出值 + +if 判断: + +if(条件){ + +}else if(条件){ + +}else{ + +} + +for 循环: + +for (let i = 1; i <= 100; i++) { + +} + +switch 判断: + +switch (条件) { + +​ case 值: + +​ alert('优秀') + +​ break; + +​ default: + +​ break; + +​ } +``` + + 1-100之间偶数相加,求加到几的时候和超过1000 + +```js +var sum = 0 + var sum1 = 0 + for (let i = 0; i <=100; i++) { + if (i%2==0) { + sum = sum + i + if (sum > 1000) { + sum1 = i + break + } + } + } + console.log(sum1); +``` + +1-100之间偶数相加,能被7整除的数字不参加累加运算,求和 + +```js +var sum1 = 0 +for (let i = 0; i <= 100; i++) { + if (i%7==0) { + continue; + } + if (i%2==0) { + sum1 = sum1 + i + } + } + console.log(sum1); +``` + + 求199-2022的润年 + +```js + var sum = 0 + for (let i = 199 ; i <=2022; i++) { + if ( (i%4==0) && (i%100==0) && (i%400==0) ) { + sum = i + console.log(sum); + } + } +``` + +输入分数,如果分数在 90-100: A 80-89:B 60-79:C 小于60:D + +```js + var score = prompt('请输入分数') + if (score>=90 && score<=100) { + alert('A') + + } + if (score>=80 && score<89) { + alert('B') + + } + if (score>=60 && score<79) { + alert('C') + + } + else + alert('D') +``` + diff --git "a/12 \351\231\210\345\215\216\344\274\237/\347\254\224\350\256\260/2022-10-14 \346\225\260\346\215\256\347\261\273\345\236\213.md" "b/12 \351\231\210\345\215\216\344\274\237/\347\254\224\350\256\260/2022-10-14 \346\225\260\346\215\256\347\261\273\345\236\213.md" new file mode 100644 index 0000000000000000000000000000000000000000..5d965bc71347a7626c022e8c92aee657a7111061 --- /dev/null +++ "b/12 \351\231\210\345\215\216\344\274\237/\347\254\224\350\256\260/2022-10-14 \346\225\260\346\215\256\347\261\273\345\236\213.md" @@ -0,0 +1,188 @@ +# 2022-10-13 + +## 循环体 + +```js +在html中嵌套javascript + +var let (声明函数) + +打印在网页 : document.write(); 在网页上打印括号中的值 + +弹窗:alert() 弹窗显示括号中的值 + +弹窗输入 :var name = prompt('请输入一个名字') + +console.log() ---打印出值 + +if 判断: + +if(条件){ + +}else if(条件){ + +}else{ + +} + +for 循环: + +for (let i = 1; i <= 100; i++) { + +} + +switch 判断: + +switch (条件) { + +​ case 值: + +​ alert('优秀') + +​ break; + +​ default: + +​ break; + +​ } +``` + + 1-100之间偶数相加,求加到几的时候和超过1000 + +```js +var sum = 0 + var sum1 = 0 + for (let i = 0; i <=100; i++) { + if (i%2==0) { + sum = sum + i + if (sum > 1000) { + sum1 = i + break + } + } + } + console.log(sum1); +``` + +1-100之间偶数相加,能被7整除的数字不参加累加运算,求和 + +```js +var sum1 = 0 +for (let i = 0; i <= 100; i++) { + if (i%7==0) { + continue; + } + if (i%2==0) { + sum1 = sum1 + i + } + } + console.log(sum1); +``` + + 求199-2022的润年 + +```js + var sum = 0 + for (let i = 199 ; i <=2022; i++) { + if ( (i%4==0) && (i%100==0) && (i%400==0) ) { + sum = i + console.log(sum); + } + } +``` + +输入分数,如果分数在 90-100: A 80-89:B 60-79:C 小于60:D + +```js + var score = prompt('请输入分数') + if (score>=90 && score<=100) { + alert('A') + + } + if (score>=80 && score<89) { + alert('B') + + } + if (score>=60 && score<79) { + alert('C') + + } + else + alert('D') +``` + +# 2022-10-14 + +## 数据类型 + +#### 基本数据类型 + +##### Number - Integer,float + +##### Boolean + +##### Null + +##### Undefined + +##### Symbol + +##### String + +## 数据类型转换 + +#### 1.显示类型转换 + +- #### Number(mix) + +- #### parseInt(str, radix) + +- #### parseFloat(string) + +- #### String(mix) + +- #### toString(radix) + +- #### Boolean() + +**练习:将10110110转成16进制** + +```js + 2-->10-->16 //先转十进制,再转十六进制 +var num = 10110110; +var num2 = parseInt(num,2); +var res = num2.toString(16); +alert(res); +``` + + + +## 常用类 + +#### Math + +求最值Math.min() Math.max() + +舍入 Math.ceil() Math.floor() Math.round() + +``` +Math:min(最小),max(最大) +Math: 舍入 ceil(向上取整) floor(向下取整) round(四舍五入) + var minnum = Math.min(1,3,5,64,76,47,84,3) + var num = Math.ceil(53.1); //54 +``` + +#### 2.Random + +```js +20-30 Radom()-->[0,1) 1-30: Random()*(31-1) --[0,30-1+1]+1 --> [1,30] +Random()*(30-20+1)+20 //[20,30] +console.log((Random())*(30-20+1)+20); //[0,11)+20 --> [20,31) -->[20,30] +console.log(parseInt(Math.random()*11)+20); +``` + +#### 3.Time + + +