1.设计一个弹框计算器 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>弹框计算器</title> </head> <body> <script type="text/javascript"> var a = prompt("请输入您要计算的内容"); var b=eval(a); document.write(b) </script>
</body> </html>
2.打印九九乘法表<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>九九乘法表</title></head><body> <script> for(var i=1;i<=9;i++){ for(var j=1;j<=i;j++){ document.write(i+"x"+j+"="+i*j+" "+" ") } document.write("<br>") } </script></body></html>
3.价格打折：请用户输入消费金额，如果用户消费的金额>=100元，则享受8折优惠，控制台显示实际应收金额
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>价格打折</title></head><body> <script> var a=prompt("请输入消费金额:"); if(a>=100){ document.write("实际实收金额为:"+0.8*a+"元"); } else{ document.write("实际实收金额为:"+a+"元"); } </script></body></html>
4.打印国际象棋棋盘(8*8循环完成)<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>国际象棋棋盘</title> <style> .d1{ width: 800px; height: 800px; border: 1px solid aqua; } .d2{ width: 100px; height: 100px; background-color:black; float: left; } .d3{ width: 100px; height: 100px; background-color: wheat; float: left; } </style></head><body><div class="d1"> <!-- <div class="d2"></div> <div class="d3"></div> --> <script> for(var i=1;i<=8;i++){ for(var j=1;j<=8;j++){ if((i+j)%2==0){ document.write('<div class="d2"></div>'); } else{ document.write('<div class="d3"></div>') } } } </script>
</body></html>
5.接收用户输入的数字，判断是否是素数
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>判断素数</title></head><body><script> var a=prompt("请输入一个正整数："); var c=0; for(var b=1;b<=a;b++){ if(a%b==0){ c++; } } if(c==2){ document.write(a+"是素数") } else{ document.write(a+"不是素数") } </script></body></html>
6.计算100以内所有奇数的和.
<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <script type="text/javascript"> var sum=0; for(var i=1;i<100;i+=2) { sum+=i; } document.write("100以内所有奇数和为："+sum); </script></body></html>
7.计算100以内的所有数的和
<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <script type="text/javascript"> var sum = 0; for(var i = 1; i <= 100; i++){ sum = sum + i; } alert(sum); </script></body></html>8.输入一个四位数，在控制台分别显示个位，十位，百位，千位的数值 var a = prompt("请输入一个四位数的正整数"); var b = parseInt(a/1000); var c = parseInt(a/100); var d = c; var e = a0; var f = parseInt(e/10); var g = a; console.log('千位数是:' + b,'百位数是:' + d,'十位数是:' + f,'个位数是:' + g);
转载于:https://www.cnblogs.com/hyh888/p/11218613.html
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