Does if with ifelse ,ifelse needs to have at least one else statement

if ()
{}else if (){}
else if (){}
else if (){}
else开发者_开发知识库{}

Do we need to have at least one else {}?

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Nope, an else block is not required.

The following is perfectly valid:

if (....) {
}
else if (...) {
}

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You do not need an else. If your conditions fail, no code will be executed without the else.

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No it is not. Neither is it required when only using an if statement. Your also asking if it needs at least one else statement. The maximum is 1 else statement. You can not have if(){}else{}else{} (Wouldn't make sense either :P)