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What is if...else if... statement in JavaScript?
The if...else if... statement is an advanced form of if?else that allows JavaScript to make a correct decision out of several conditions.
Syntax
The syntax of an if-else-if statement is as follows ?
if (expression 1){
Statement(s) to be executed if expression 1 is true
}
else if (expression2){
Statement(s) to be executed if expression 2 is true
}
else if (expression3){
Statement(s) to be executed if expression 3 is true
}
else{
Statement(s) to be executed if no expression is true
}
Example
You can try to run the following to learn how to work with if?else if statement in JavaScript ?
<html>
<body>
<script>
var book = "maths";
if( book == "history" ){
document.write("<b>History Book</b>");
}
else if(book == "maths" ){
document.write("<b>Maths Book</b>");
}
else if(book == "economics" ){
document.write("<b>Economics Book</b>");
}
else{
document.write("<b>Unknown Book</b>");
}
</script>
</body>
</html> 
Updated on: 2020-06-13T11:41:16+05:30
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