Summary - Operators

Combine arithmetic, logical and Elvis operators to build a grade calculator.

Summary - Operators

So far you've learned arithmetic, assignment, comparison, logical and Elvis operators. Each group serves a different purpose: arithmetic for calculations, assignment for changing values, comparison for conditions, logical for combining Booleans, Elvis for null handling.

These operators are the basic tools for writing calculations and conditions in code. Choosing the right operator makes code both shorter and more readable.

Exercise Put it together

Write a fun main(). Declare val a = 10 and val b = 3. Print whether the remainder equals 1 with println(a % b == 1).

Show example solution

fun main() {
    val a = 10
    val b = 3
    println(a % b == 1)
}

Next step

Congratulations! You've completed the operators group. You've learned all the fundamentals of the beginner level: program structure, variables, data types, the calculator project and operators.

In the next, intermediate level you'll focus on control flow, functions, classes and collections. With solid fundamentals, the intermediate level will feel much smoother.

Test yourself

Which is a logical operator?
- &&
- +
- %
- ?:
Show answer

&& — && is a logical operator.
Match the concepts

+

Addition
==

Equal
&&

And
?:

Elvis

Summary - Operators: fill in the missing part

val name = input ____ "Guest"

Show answer

val name = input ?: "Guest"

Next lesson: Creating strings

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