Switch Statement
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Switch Statement
The switch statement is used in JavaScript to execute one code from multiple expressions.
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):