Kotlin Return and Jump

Syntax

Return Statement

return //returns from the nearest enclosing function
return expression //returns with the value of the expression

Jump Statements

break //terminates the nearest enclosing loop or when expression
continue //skips the current iteration of the nearest enclosing loop

Example

Return Statement

fun multiply(a: Int, b: Int): Int {
    return a * b
}

val result = multiply(2, 3)
println(result) //outputs 6

Jump Statements

val numbers = listOf(1, 2, 3, 4, 5)

for (number in numbers) {
    if (number == 3) {
        continue //skips 3 and continues to next iteration
    }
    println(number)
    if (number == 4) {
        break //terminates the loop when 4 is encountered
    }
}
//outputs 1 2 4

Output

6
1
2
4

Explanation

The return statement in Kotlin is used to exit a function and return a value if necessary. The function can be terminated at any point with the return statement, including within a loop or when block.

The jump statements in Kotlin are used to control the flow of the program. The break statement is used to terminate a loop prematurely, while the continue statement is used to skip the current iteration of a loop.

Use

Return and jump statements are useful for controlling the flow of a program and exiting functions or loops when necessary. They can be used for error handling, optimization, and general control of program flow.

Important Points

• Return statements can be used to exit a function and return a value if necessary.
• Jump statements can be used to control the flow of a program and control loops.
• The return statement can be used within loops and when blocks.
• The break statement is used to terminate a loop prematurely.
• The continue statement is used to skip the current iteration of a loop.

Summary

Kotlin return and jump statements are an important tool for controlling the flow of a program. The return statement is used to exit a function and return a value if necessary, while the jump statements are used to control loops and interrupt the flow of a program. Understanding when and how to use these statements is important for efficient and effective code.