Control Structure in Js

The control structure Switch in Js uses varday12; // switch (day) {// case1: // document. write (& quot; Monday & quot;); // break; // case2: // document. write (& quot; Tuesday & quot;); // break; // case3: // document. w

 

Control Structure in Js

Switch usage

Var day = 12;

// Switch (day ){

 

// Case 1:

// Document. write ("Monday ");

// Break;

// Case 2:

// Document. write ("Tuesday ");

// Break;

// Case 3:

// Document. write ("Wednesday ");

// Break;

// Case 4:

// Document. write ("Thursday ");

// Break;

// Case 5:

// Document. write ("Friday ");

// Break;

// Case 6:

// Document. write ("Saturday ");

// Break;

// Case 7:

// Document. write ("lifecycle 7 ");

// Break;

// Default: document. write ("enter a number between-7 ");

//}

The difference between using and without a break is as follows: www.2cto.com

/// Define the three variables of the year, month, and day, and assign values to calculate that the date is the day of the current year.

// Var year = 2012; // year

// Var month = 5; // month

// Var day = 12; // day

// Var days = 0;

// Switch (month-1 ){

// Case 11: days + = 30;

// Case 10: days + = 31;

// Case 9: days + = 30;

// Case 8: days + = 31;

// Case 7: days + = 31;

// Case 6: days + = 30;

// Case 5: days + = 31;

// Case 4: days + = 30;

// Case 3: days + = 31;

// Case 2:

// If (year % 4 = 0 & year % 100! = 0) | (year % 400 = 0 )){

// Days + = 29

//

//}

// Else {

//

// Days + = 28;

//}

//

// Case 1: days + = 31;

 

 

//}

// Days + = day;

// Document. write (year + "year" + month + "month" + day + ", which is the" + days + "day" of this year ");

 

For Loop usage:

For (a = 1; a <10; a ++ ){

// Document. write ("");

 

 

//}

 

Use of While and do while

 

// N = 1;

 

// While (n <= 10 ){

// N ++;

 

 

 

//}

//// Do while is the first execution in the judgment

// M = 9;

// Do {

 

// Document. write ("m ");

//}

 

Author: Aweijun360