How can I achieve an elseif in a JavaScript condition?
Conditional statements are used to perform different actions based on different conditions.
Use if
to specify a block of code to be executed, if a specified condition is true
Use else
to specify a block of code to be executed, if the same condition is false
Use else if
to specify a new condition to test, if the first condition is false
You could use this syntax which is functionally equivalent:
switch (true) {
case condition1:
//e.g. if (condition1 === true)
break;
case condition2:
//e.g. elseif (condition2 === true)
break;
default:
//e.g. else
}
This works because each condition
is fully evaluated before comparison with the switch
value, so the first one that evaluates to true
will match and its branch will execute. Subsequent branches will not execute, provided you remember to use break.
Note that strict comparison is used, so a branch whose condition
is merely "truthy" will not be executed. You can cast a truthy value to true
with double negation: !!condition
.
You are missing a space between else
and if
It should be else if
instead of elseif
if(condition)
{
}
else if(condition)
{
}
else
{
}
Just add a space:
if (...) {
} else if (...) {
} else {
}
Actually, technically when indented properly, it would be:
if (condition) {
...
} else {
if (condition) {
...
} else {
...
}
}
There is no else if
, strictly speaking.
(Update: Of course, as pointed out, the above is not considered good style.)
x = 10;
if(x > 100 ) console.log('over 100')
else if (x > 90 ) console.log('over 90')
else if (x > 50 ) console.log('over 50')
else if (x > 9 ) console.log('over 9')
else console.log('lower 9')