JS Statements

Js statement check the condition true or False.

Types of Statements.

If Statement
If else statement
if else if statement

1) If Statement

if statement is used to test the condition this statements get execute only when the given condition is true. If the condition is false then the statements inside if statement body are completely ignored.

Syntax:

if(condition){
//code to be executed
}

Example:

   <html>
<body>
<script>  
var a=15;  
if(a<18){  
document.write("Vote for Eligible 18 Years");  
}  
</script>   
</body>
</html>

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2) If else statement

if-else statement also tests the condition. when if condition is true then print your if body statement, else part statement do not tuch.

Otherwise if part statement is false then else block is executed.

Syntax:

if (condition) {
        statement-1
    }
    else{
        statement-2
   } 

Example:

   <html>
<body>
<script>  
var a=4;  
if(a%2==0){  
document.write("a is even number");  
}  
else{  
document.write("a is odd number");  
}  
</script>    
</body>
</html>

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3) if else if statement

Executes one condition in Multiple statements.

Syntax

 
if(condition1){  
//code to be executed if condition1 is true  
}else if(condition2){  
//code to be executed if condition2 is true  
}  
else if(condition3){  
//code to be executed if condition3 is true  
}  
...  
else{  
//code to be executed if all the conditions are false  
}  

Example:

 <html>
<body>
<script>  
var a=20;  
if(a==10){  
document.write("a is equal to 10");  
}  
else if(a==15){  
document.write("a is equal to 15");  
}  
else if(a==20){  
document.write("a is equal to 20");  
}  
else{  
document.write("a is not equal to 10, 15 or 20");  
}  
</script>     
</body>
</html>

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JS Tutorials

JS Statements

Types of Statements.

1) If Statement

2) If else statement

3) if else if statement