Comparison operators in Kotlin - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the == operator do in Kotlin?

The == operator checks if two values are equal in content. It compares the values, not their memory addresses.

intermediate

What is the difference between == and === in Kotlin?

== checks if two objects have the same value (content equality). === checks if two references point to the exact same object (reference equality).

beginner

List the basic comparison operators in Kotlin.

The basic comparison operators are: == (equal), != (not equal), < (less than), <= (less than or equal), > (greater than), >= (greater than or equal).

beginner

What is the result type of comparison operators in Kotlin?

Comparison operators return a Boolean value: true if the comparison is correct, false otherwise.

intermediate

How can you compare two strings ignoring case in Kotlin?

Use the function equals(other, ignoreCase = true) to compare two strings without considering letter case.

Which operator checks if two variables have the same value in Kotlin?

A !=

B ===

C <=

D ==

The == operator checks if two variables have the same value (content equality).

What does the === operator check in Kotlin?

A If two references point to the same object

B If one value is greater than another

C If two values are not equal

D If two values are equal

The === operator checks if two references point to the exact same object (reference equality).

What type of value do comparison operators return in Kotlin?

A Int

B String

C Boolean

D Double

Comparison operators return a Boolean value: true or false.

Which operator means 'not equal' in Kotlin?

A !=

B ==

C <=

D >=

The != operator means 'not equal' in Kotlin.

How do you compare two strings ignoring case in Kotlin?

A Use <code>==</code>

B Use <code>equals(other, ignoreCase = true)</code>

C Use <code>===</code>

D Use <code>!=</code>

Use equals(other, ignoreCase = true) to compare strings ignoring case.

Explain the difference between == and === operators in Kotlin.

Think about comparing what is inside versus comparing the actual object.

List all basic comparison operators in Kotlin and what they do.

Think about how you compare numbers or values in daily life.