python question mark code example
Example 1: dart double question mark
// This means a equals b, but if b is null then a equals 'hello'.
String a = b ?? 'hello';
Example 2: question mark and colon in javascript
const isBlack = false;const text = isBlack ? 'Yes, black!' : 'No, something else.';console.log(text);// "No, something else."