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प्रश्न
Explain switch case statement with example.
उत्तर
JavaScripts offers the switch statement as an alternate to using if…else structure. The switch statement is especially useful when testing all the possible results of an expression.
The syntax of a switch structure as the following:
switch(expression)
{
` case label1:
statements1;
break;
case label2:
statements2;
break;
case labeln;
statements - N;
break;
default:
statements;
}Working of switch statement:
The switch statement begins by evaluating an expression placed between parenthesis, much like the if statement. The result compared to labels associated with case structure that follow the switch statement. If the result is equal to a label, the statements in the corresponding case structure are executed.
The default structure is can be at the end of a switch structure if the result of the expression that do not match any of the case labels. The break statement is also used commonly within switch to exit the statement once the appropriate choice is found.
Example:
HTML CODE
<Html>
<Head>
<Title>Program - To test witch command in JavaScript </Title>
</Head>
<Body>
<script language="javascript" type="text/javascript">
var grade=0;
var marks=prompt(“Please enter your marks/100:”,”0”);
if(marks>90)
{grade=1;}
else if(marks>70)&&(marks<=90)
{grade=2;}
else if(marks>50)&&(marks<=70)
{grade=3;}
else if(marks>40v)&&(marks<=50)
{grade=4;}
else
{grade=5;}
switch(grade)
{
case 1:
document.write("Your Grade is Outstanding..");
break;
case 2:
document.write("Your Grade is Excellent..");
break;
case 3:
document.write("Your Grade is Good..");
break;
case 4:
document.write("Your Grade is Satisfectory..");
break;
default:
document.write("Your Grade Poor and have to re-appear Exam..");
}
</script>
</Body>
</Html>The output will be
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संबंधित प्रश्न
Which of the following is not a branching statement?
What will be the output for the following snippet:
For (var n=0; n<10; n++)
{
if (n==3)
{
break;
}
document write (n+”<br>”);
}What are the different types of control statement used in JavaScript?
What is meant by conditional statements in JavaScript?
Write the general syntax for switch statement.
Differentiate the break and continue statement.
Write the output for the following program.
<Html>
<Head>
<Title> for statement</title>
<Head>
<Body>
<script language= "java Script" type = "text / javaScript")
var no1= prompt ("please enter table you want:", "0" );
document write ("<h2> multiplication for your need </h2>")
for (Var no2= 0; no2<=10; no2++)
{
document write (no1+ "x" + no2+ "=" + no1+no2+ "<br>);
}
</script>
</body>
</Html>Rewrite the following code using the if-else statement:
int m = 400;
double cl). = (m>300) ? (m/10.0) * 2; (m/20.0) - 2;Give the output of the following program segment:
int n = 4279; int d;
while(n>0)
(d=n%10;
System.out.println(d);
n=n/100;
}A student executes the following program segment and gets an error. Identify the statement which has an error, correct the same to get the output as WIN.
boolean x=true;
switch(x)
{ case 1:System.out.println("WIN");break;
case 2;System.out.println("LOOSE");
}