Conditional statements

We've already used conditionals many times. It's hard to have your program make sense without a conditional or logical statement. These statements help keep the flow of the program intact. Moreover, logic implementation is also easier with the use of these. Scala supports if and else conditional statements.

The if else conditional expression

In Scala, you can use if else to control program flow. The generic syntax for an if else statement goes as follows:

if (condition (is true)) 
          ... //Block of code to be executed 
else 
          ... //Block of code to be executed 

scala> val age = 17 
age: Int = 17 

scala> if(age > 18) println("You're now responsible adult.") else println("You should grow up.") 
You should grow up. 

Above, we defined a variable age with value 17. In the next line, we checked a condition age > 18. If age is greater than 18 then we printed some string. You're now a responsible adult, or some other string. Instead of just printing...