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How to implement a trapezoid multiplication table using JavaScript

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Author: User
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How to implement a trapezoid multiplication table using JavaScript

How to implement a trapezoid multiplication table using JavaScript

This article mainly introduces how to use JavaScript to implement a trapezoid multiplication table. It involves the skills of combining basic javascript with table operations. For more information, see

This example describes how to implement a trapezoid multiplication table using JavaScript. Share it with you for your reference. The details are as follows:

Shows the effect:

The table uses tables, tr, and td in html, and then uses the for statement to output rows and columns cyclically, and then perform multiplication based on the number of rows and columns. The first for loop outputs 9 rows, then, we embed a for statement, take the value of the first for loop in the conditional expression, and perform the output table operation. Why should we take the first for loop, because the number of times of the first for loop is the rule of trapezoid arrangement, the rule of trapezoid arrangement is a grid in the first row, two grids in the second row, three grids in the third row, and so on.

The complete code is as follows:

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<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN"

Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>

<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head>

<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>

<Title> untitled document </title>

<Script type = "text/javascript">

Var str = "<table border = 1 width = 500 align = center> ";

For (var a = 1; a <= 9; a ++)

{

Str + = "<tr> ";

For (B = 1; B <= a; B ++)

{

Str + = "<td>" + a + "×" + B + "=" + a * B + "</td> ";

}

Str + = "</tr> ";

}

Str + = "</table>"

Document. write (str );

</Script>

</Head>

<Body>

</Body>

</Html>

I hope this article will help you design javascript programs.

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