Flutter int value if first digit is not zero I want to get first value

for example

int x=123 result =1;

another example int y=234; result=2;

if the first value is zero I want to get the second value

for example int a=023; result=2;

another example int b=098; result=9;

how can i do this using dart?

CodePudding user response：

There surely is a more mathematical way, but one way to do this is to convert the int to a String, get the first character and parse it back to int :

var numbers = [
    1234,
    567,
    89,
  ];
  for(var number in numbers) {
    var firstNumber = int.parse(number.toString()[0]);
    print(firstNumber);
  }

Output :

1
5
8

CodePudding user response：

This will give you the first non-zero digit. Assuming you get your number as a String. Otherwise it is pointless because the int value = 0123 is the same as int value = 123.

  String yourNumber = "0123";
  final firstNonZero = int.tryParse(yourNumber.split('').firstWhere((element) => element != '0', orElse: () => ''));
  print(firstNonZero);