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Ternary Operator in Dart Programming
The ternary operator is a shorthand version of an if-else condition. There are two types of ternary operator syntax in Dart, one with a null safety check and the other is the same old one we encounter normally.
Syntax 1
condition ? expressionOne : expressionTwo;
The above syntax implies that if a certain condition evaluates to true then we evaluate the expressionOne first and then the expressionTwo.
Example
Let's explore a Dart example where we make use of the above syntax of the ternary operator.
Consider the example shown below −
void main(){
var ans = 10;
ans == 10 ? print("Answer is 10") : print("Oh no!");
}In the above example, we declared a variable named ans with a value 10, and then in the next line, we have a condition of the ternary operator where we are checking if it is equal to 10. If so, then evaluate the first expression else evaluate the expression after the colon (:).
Output
Answer is 10
Syntax 2
expression1 ?? expression2
It depicts a conditional statement that is similar to a ternary operator statement. The only difference is that in the above syntax if expression1 is not null, then it gets evaluated else expression2 is evaluated.
Example
Consider the example shown below −
void main(){
var ans;
ans ?? print("ans is null");
}Output
ans is null
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