Conditional expression in Scala

usage

scala conditional expression syntax and Java basically the same.

the difference

1. In the scala conditional expressions that return a value of
2. In the scala without a triple expression, alternative expressions may be used if a triplet of expressions

The sample code

//定义一个变量sex，再定义一个result变量，如果sex等于"male"，result等于1，否则result等于0
val sex = "man"
val result = if(sex == "man") {1 }else{0}
//也可以这样写 
val result = if(sex == "man") 1 else 0

Block expression

• scala using {} represents a block expression
• And if expressions, the expression is also a value of block
• Value is the value of the last expression

The sample code

val a = {
      println("1 + 1")
      1 + 1
      }