设置日期对象（年-月-日 时-分-秒）实现菱形的拼接
1.getFullYear():返回4位数的年份
2.getMonth():返回日期中的月份，返回值为0-11
3.getDate():返回月份中的天数
4.getDay():返回星期，返回值为0-6
5.getHours():返回小时
6.getMinutes():返回分
7.getSeconds():返回秒
8.getTime():返回表示日期的毫秒数
<script> window.onload = function () { anniu = window.setInterval(kaishitime, 1000); // var num = prompt('请输入一个数字'); // getValus(num); }; var anniu;//计时器开始时整个赋值给这个变量，作用是关闭时通过这个变量来关闭指定定时器。 // 开始计时 function kaishi() { anniu = window.setInterval(kaishitime, 1000); } // 结束计时 function jieshu() { window.clearInterval(anniu); } var kaishitime = function () { var shijian = new Date(); var shi = shijian.getHours();//小时 if (shi < 10) { shi = '0' + shi; }; var fengzhong = shijian.getMinutes();//分钟 if (fengzhong < 10) { fengzhong = '0' + fengzhong; } var miao = shijian.getSeconds();//秒数 if (miao < 10) { miao = '0' + miao; } var riqi = shijian.toLocaleDateString(); riqi = riqi.replace(/\//g, '-'); var str = riqi + " " + shi + ":" + fengzhong + ":" + miao; document.getElementById('demo').innerHTML = str; }; function getValus(num) { if (num < 1) { console.log(num); } else if (num >= 1 && num < 10) { console.log(2 * num - 1); } else if (num >= 10) { console.log(3 * num - 11); } } //菱形 var alt = ""; var _num = 5; for(var i=1; i<=_num; i++){ var blank = ""; for(var j=1; j<=_num-i; j++){ //打印空格 blank += " "; } var stars = ""; for(var m=1; m<=2*i-1; m++){ //打印* stars += "*"; } alt += blank + stars + "\n"; //字符串的拼接,拼为一行 } for(var i=_num-1; i>0; i--){ //打印的行数要减1 var blank = ""; for(var j=1; j<=_num-i; j++){ //打印空格 blank += " "; } var stars = ""; for(var m=1; m<=2*i-1; m++){ //打印* stars += "*"; } alt += blank + stars + "\n"; //字符串的拼接,拼为一行 } console.log(alt); </script> <body> <div id="demo"> </div> <input type="button" value="开始时间" onclick="kaishi()"> <input type="button" value="结束时间" onclick="jieshu()"> </body>
<script>window.onload = function () { anniu = window.setInterval(kaishitime, 1000); // var num = prompt('请输入一个数字'); // getValus(num);};var anniu;//计时器开始时整个赋值给这个变量，作用是关闭时通过这个变量来关闭指定定时器。// 开始计时function kaishi() { anniu = window.setInterval(kaishitime, 1000);}// 结束计时function jieshu() { window.clearInterval(anniu);}
var kaishitime = function () { var shijian = new Date(); var shi = shijian.getHours();//小时 if (shi < 10) { shi = '0' + shi; }; var fengzhong = shijian.getMinutes();//分钟 if (fengzhong < 10) { fengzhong = '0' + fengzhong; } var miao = shijian.getSeconds();//秒数 if (miao < 10) { miao = '0' + miao; } var riqi = shijian.toLocaleDateString(); riqi = riqi.replace(/\//g, '-'); var str = riqi + " " + shi + ":" + fengzhong + ":" + miao; document.getElementById('demo').innerHTML = str;};
function getValus(num) { if (num < 1) { console.log(num); } else if (num >= 1 && num < 10) { console.log(2 * num - 1); } else if (num >= 10) { console.log(3 * num - 11); }}
//菱形 var alt = ""; var _num = 5; for(var i=1; i<=_num; i++){ var blank = ""; for(var j=1; j<=_num-i; j++){ //打印空格 blank += " "; } var stars = ""; for(var m=1; m<=2*i-1; m++){ //打印* stars += "*"; } alt += blank + stars + "\n"; //字符串的拼接,拼为一行 } for(var i=_num-1; i>0; i--){ //打印的行数要减1 var blank = ""; for(var j=1; j<=_num-i; j++){ //打印空格 blank += " "; } var stars = ""; for(var m=1; m<=2*i-1; m++){ //打印* stars += "*"; } alt += blank + stars + "\n"; //字符串的拼接,拼为一行 } console.log(alt); </script>
