Console Input - Dart Programming

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[efemerictunali]

I'm new at Dart. This video was very useful for me. Thanks

[vilao.]

For all type in dart !
import 'dart:io';
void main(){
double? valor =
int? valor_int =
String? name = stdin.readLineSync() ;
}
* ? and ! they are null operators*

[armagan_gok]

0 import 'dart:io';
1
2 void main() {
3 String str = stdin.readLineSync();
4 print(str);
5 print("End of application");
6 }
~
Error: A value of type 'String?' can't be assigned to a variable of type 'String' because 'String?' is nullable and 'String' isn't

[mohamedhassan-qgvf]

import 'dart:io';

main() {
print('please enter your age');
int age =
print (age);
}

[mennagamea]

Hey, I tried to do the same but I got this error:
global evaluation not supported
what should I do?

[mohamedhassan-qgvf]

it doesn't work with me, I can't enter or input any data

[danialpm]

I run but it does not receive input from me

[gaashajiofficial]

error show me please i am suing dart pad pleaqse solve eror