Android Development with Kotlin

The while loop

The while loop repeats a block, while its conditional expression returns true:

    while (condition) { 
        //code 
    } 

There is also a do... while loop that repeats blocks as long as a conditional expression is returning true:

    do { 
        //code 
    } while (condition)  

Kotlin, as opposed to Java, can use variables declared inside the do... while loop as a condition:

    do { 
        var found = false 
        //.. 
    } while (found) 

The main difference between the while and do... while loops is when a conditional expression is evaluated. A while loop checks the condition before code execution and if it is not true, the code won't be executed. On the other hand, a do... while loop first executes the body of the loop, and then evaluates the conditional expression, ...