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Example of loop in js

Source: Internet
Author: User
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Multiplication

// For (I = 1; I <= 9; I ++) {// control row

 

// For (j = 1; j <= I; j ++) {// Control

 

// Document. write (I + "*" + j + "=" + (I * j) + "& nbsp ");

//}

// Document. write ("<br/> ");

 

//}

/*

*

***

*****

 

*/

 

// For (I = 1; I <= 5; I ++) {// control row

 

// For (j = 1; j <= 2 * I-1; j ++) {// Control

 

// Document. write ("*");

//}

// Document. write ("<br/> ");

 

//}

 

 

 

/*

*

***

*****

*******

*********

***********

*************

***************

*****************

*******************

 

 

*/

// For (I = 1; I <= 10; I ++ ){

//// Print space

// For (t = 1; t <= 10-I; t ++ ){

 

// Document. write ("& nbsp ");

 

//}

// For (j = 1; j <= 2 * I-1; j ++ ){

 

 

// Document. write ("*");

 

 

//}

// Document. write ("<br/> ");

//}

 

 

// Print the diamond Graph

 

 

// For (I = 1; I <= 5; I ++ ){

//// Print space

// For (t = 1; t <= 5-i; t ++ ){

 

// Document. write ("& nbsp ");

 

//}

// For (j = 1; j <= 2 * I-1; j ++ ){

 

 

// Document. write ("*");

 

 

//}

// Document. write ("<br/> ");

//}

 

 

/*

Number of rows, number of stars, number of spaces

*/

For (I = 4; I> = 1; I --){

// For (t = 4; t> = I; t --)

For (t = 5-i; t> = 1; t --)

{

 

Document. write ("& nbsp ;");

 

}

For (j = 1; j <= 2 * I-1; j ++ ){

Document. write ("*");

 

 

}

Document. write ("<br/> ");

 

}

 

 

 

You can use the for loop to implement some related images.

 

For example, print the diamond:

*

***

*****

*******

*********

*******

*****

***

*

// Print the diamond Graph

 

 

For (I = 1; I <= 5; I ++ ){

// Print space

For (t = 1; t <= 5-i; t ++ ){

 

Document. write ("& nbsp ");

 

}

For (j = 1; j <= 2 * I-1; j ++ ){

 

 

Document. write ("*");

 

 

}

Document. write ("<br/> ");

}

 

 

/*

Number of rows, number of stars, number of spaces

*/

For (I = 4; I> = 1; I --){

// For (t = 4; t> = I; t --)

For (t = 5-i; t> = 1; t --)

{

 

Document. write ("& nbsp ;");

 

}

For (j = 1; j <= 2 * I-1; j ++ ){

Document. write ("*");

 

 

}

Document. write ("<br/> ");

 

}

 

 

 

 

/*

*

**

**

**

*****

*/

For (I = 1; I <= 5; I ++)

{

// Print space

For (t = 1; t <= 5-i; t ++)

{

Document. write ("& nbsp ;");

}

 

For (j = 1; j <= 2 * I-1; j ++)

{

// Print other rows except the last row, with spaces in the first and last columns.

If (I <5)

{

If (j = 1 | j = 2 * i-1)

Document. write ("*");

Else

Document. write ("& nbsp ;");

}

Else // last line, odd *, even space

{

If (j % 2! = 0)

Document. write ("*");

Else

Document. write ("& nbsp ;");

}

}

Document. write ("<br/> ");

}

 

 

 

 

<! DOCTYPE html PUBLIC "-// W3C // DTDXHTML 1.0 Transitional //" 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 = gb2312"/>

<Title> triangle printing </title>

</Head>

 

<Body style = "text-align: center;">

<Script type = "text/javascript">

Var k = prompt ("Enter the number of printed rows :","");

For (var I = 1; I <= k; I ++)

{

For (varj = 0; j <I; j ++)

{

Document. write ("* & nbsp ;");

}

Document. write ("<br/> ");

}

</Script>

</Body>

</Html>

 

From Aweijun360

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