if and printing
The if/else control structure allows you to chose the way your program control flows. You don't always need else, as you'll experience in this exercise.
If a player reaches 21 points, they'd probably appreciate a little recognition!
In this exercise, you'll use the if keyword to print a congratulations when a player's hand equals 21. Remember, when there is no else, use curly braces for good Scala style! The card variables you need are already defined.
本练习是课程的一部分
Introduction to Scala
练习说明
- Write code that accomplishes the following: if a player's hand is equal to 21, print
"Twenty-One!"to output. - Click "Run Code" and observe the output.
- Change
fourSpadestothreeSpades, then click "Submit Answer".
交互式实操练习
通过完成这段示例代码来试试这个练习。
// Point value of a player's hand
val hand = sevenClubs + kingDiamonds + fourSpades
// Congratulate the player if they have reached 21