Switch Statement


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Switch Statement

The switch statement is used in JavaScript to execute one code from multiple expressions.

switch statement javascript

Example

switch(expression)
{
case value1:
statement;
break;  
case value2:
statement;
break;  
......

default: 
statement;
}

Note: default code to be executed if above values are not matched

Note: in switch statement all the cases will be evaluated if we do not use break statement.

Example of switch statement in javascript.

Example

<script>  
var grade='B';  
var result;  
switch(grade){  
case 'A':  
result="A Grade";  
break;  
case 'B':  
result="B Grade";  
break;  
case 'C':  
result="C Grade";  
break;  
default:  
result="No Grade";  
}  
document.write(result);  
</script>  

Result

Output: B Grade

Example of switch case in javascript

Example

<html>
<head>
<script>
function myFunction()
 {
 var day;
 day=Number(document.getElementById("first").value);
 switch (day) 
{
        case 1:
            day = "Sunday";
            break;
        case 2:
            day = "Monday";
            break;
        case 3:
            day = "Tuesday";
            break;
        case 4:
            day = "Wednesday";
            break;
        case 5:
            day = "Thursday";
            break;
        case 6:
            day = "Friday";
            break;
        case  7:
            day = "Saturday";
            break;
default:
day="Enter valid number"
    }
    document.getElementById("demo").innerHTML =day;
}
</script>
</head>
<body>
<p>Enter any number (1 to 7):</p>
<input id="first">
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
</body>
</html>

Result

Enter any number (1 to 7):


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