Dart Conditional Operators

In this tutorial you will learn about the Dart Conditional Operators and its application with practical example.

Dart Conditional Operators ( ? : )

The conditional operator is considered as short hand for if-else statement. Conditional operator is also called as “Ternary Operator”.

Table Of Contents−

Syntax 1:-

condition ? expOne : Exp

1	condition ? expOne : Exp

If condition is true the expression will return expr1, if it is not it will return expr2.

Example:-

void main()
{
  var res = 10 > 15 ? "Greater":"Smaller"; 
  print(res); 
}

void main()

{

var res = 10 > 15 ? "Greater":"Smaller";

print(res);

}

Output:-

Smaller

Smaller

Syntax 2:-

expr1 ?? expr2

1	expr1 ?? expr2

If expr1 is non-null, returns its value; otherwise, evaluates and returns the value of expr2.

Example:-

void main() { 
   var n1 = null; 
   var n2 = 15; 
   var res = n1 ?? n2; 
   print(res); 
}

void main() {

var n1 = null;

var n2 = 15;

var res = n1 ?? n2;

print(res);

}

Output:-

15