how to create an exception inside a flutter for loop - flutter

Question

I need the items inside a for to have an action with the exception of the last one, which will have a different action
an example that DOESN'T WORK:
for (var i = 0; i < 10; i++) {
print('1 - 9');
if (i.last) {
print('last item');
}
}

Answer 1

You can put method in the condition part of the for loop. Here is such example:
void main() {
const limit = 10;
for(int i =0 ;
() {
if(i < limit && i < limit-1) {
doActionA(i);
return true;
}
else if(i < limit){
doActionB(i);
return true;
}
return false;
}()
; i++);
}
void doActionA(int i){
print('Not last $i');
}
void doActionB(int i) {
print('last $i');
}
output
Not last 0
Not last 1
Not last 2
Not last 3
Not last 4
Not last 5
Not last 6
Not last 7
Not last 8
last 9

Answer 2

Try this:
for (var i = 0; i < 10; i++) {
print('0 - 8');
if (i == 9) {
print('last item');
}
}

Answer 3

you can try this
for (var i = 0; i < 10; i++) {
print('1 - 9');
if (i==9) {
print('last item');
throw Exception("Your message");
}
}

Answer 4

This is also possible, you can just paste the snippet in DartPad and play with it
void main() {
try {
for (var i = 0; i < 10; i++) {
if (i == 3) {
print('item $i');
throw 'customError';
} else {
print('item $i');
}
}
} catch (e) {
if (e == 'customError') {
print('You caught your custom error \n $e');
} else {
print('You caught some other error');
}
}
}
Hope that will help