Ternary expressions in Scala provide a concise way to express conditional statements. The syntax of a ternary expression in Scala is:
condition ? true-expression : false-expression
Here, condition is the conditional statement which is evaluated to either true or false. true-expression is the expression that is returned if the condition evaluates to true, and false-expression is the expression that is returned if the condition evaluates to false.
Here are a few examples of using ternary expressions in Scala:
Example 1:
val a = 10
val b = 20
val result = if(a > b) "a is greater than b" else "b is greater than a"
println(result)
Output: b is greater than a
Here, if(a > b) "a is greater than b" else "b is greater than a" is the ternary expression. If a > b is true, then the value "a is greater than b" is assigned to the result variable, otherwise "b is greater than a" is assigned to it.
Example 2:
val marks = 75
val result = marks match {
case x if x >= 60 => "Pass"
case _ => "Fail"
}
println(result)
Output: Pass
Here, marks match { case x if x >= 60 => "Pass"; case _ => "Fail" } is the ternary expression. If marks is greater than or equal to 60, then the value "Pass" is assigned to the result variable, otherwise "Fail" is assigned to it. The match expression is used to pattern-match the marks variable against different cases.
These are some examples of how to use ternary expressions in Scala. They provide a concise way of expressing conditional statements and can make the code more readable and efficient.