直角三角形
<script type="text/javascript">
for(
var i=1;i<=8;i++
){
for(
var j=1;j<=i;j++){
//j 指的是*的个数
document.write("*"
);
}
document.write('<br>'
);
}
document.write("<hr />");
//增加一个分割线
document.write("<hr />");
//增加一个分割线
</script>
直角三角形
倒直角三角形
<script type="text/javascript">
for(
var i=1;i<=8;i++){
//控制行
for(
var j=1;j<=8-i;j++){
//控制列
document.write("*"
);
}
document.write('<br>'
);
}
document.write("<hr />"
);
document.write("<hr />");
//增加一个分割线
</script>
倒直角三角形
斜三角形
<script type="text/javascript">
for (
var i = 1; i <= 6; i++
) {
for (
var j = 1; j <= 6-i; j++) {
//j 指的是空格的个数
document.write(" "
);
}
for (
var k = 1; k <= i; k++
) {
document.write("*"
);
}
document.write("<br />"
);
}
document.write("<hr />"
);
</script>
斜三角形
等腰三角形
<script type="text/javascript">
for (
var i = 1; i <= 6; i++
) {
for (
var j = 1; j <= 6-i; j++) {
//j 指的是空格的个数
document.write(" "
);
}
for (
var k = 1; k <= i; k++
) {
document.write("*"
);
}
document.write("<br />"
);
}
document.write("<hr />"
);
document.write("<hr />"
);
</script>
<script type="text/javascript">
for (
var i= 1; i <= 5; i++
) {
for (
var j = 1; j <= 5-i; j++
) {
document.write(" "
);
}
for (
var k = 1; k <= i*3-2; k++) {
//i*3-2越大，三角形越宽
document.write("*"
);
}
document.write("<br />"
);
}
document.write("<hr />"
);
document.write("<hr />"
);
</script>
等腰三角形
菱形
<script type="text/javascript">
for (
var i = 1; i <= 5; i++
) {
for (
var j = 1; j <= (5-i); j++
) {
document.write(" "
);
}
for (
var k = 1; k <= i*2-1; k++
) {
document.write("*"
);
}
document.write("<br />"
);
}
for (
var i = 1; i <= 4; i++
) {
for (
var j = 1; j <= i; j++
) {
document.write(" "
);
}
for (
var k = 1; k <= (4-i)*2+1; k++
) {
document.write("*"
);
}
document.write("<br />"
);
}
document.write("<hr />"
);
document.write("<hr />"
);
</script>
<!--<div style="text-indent:0.5em">-->
<script type="text/javascript">
for (
var i = 1; i <= 5; i++
) {
for (
var j = 1; j<= (5-i); j++) {
//j 指的是空格的个数
// document.write(" ");
document.write(j);
}
for (
var k= 1; k <= i*2-1; k++
) {
document.write("*"
);
}
document.write("<br />"
);
}
for (
var i = 1; i<= 4; i++
) {
for (
var j = 1; j<= i; j++
) {
document.write(" "
);
}
for (
var k = 1;k <= (4-i)*2+1; k++
) {
document.write("*"
);
}
document.write("<br />"
);
}
document.write("<hr />"
);
document.write("<hr />"
);
</script>
<!--</div>-->
菱形
99乘法表
<script type="text/javascript">
for(
var n=1;n<=9;n++) {
//控制行
for (
var m = 1; m <= n ; m++) {
//控制列
var b = m *
n;
document.write(m + "x" + n + "=" + b + " "
);
}
document.write('<br/>'
);
document.write('<br/>');
//为了增加行与行的间距
}
document.write("<hr />");
//增加一个分割线
</script>
9*9乘法表
转载于:https://www.cnblogs.com/daofaziran/p/9259402.html
相关资源：javascript入门笔记
