The if-else is a conditional expression that describes a situation that could occur or exist if a certain condition is met. This video will introduce you to Kotlin if-else statements. The tutorial further teaches different types of if-else expressions like if else if ladder expressions, if expression, and Nested if expression. You will understand all these expressions in detail and with the help of hands-on examples.

2. What’s in it for you ?
Conditionals in Kotlin
Different types of if else expressions
If expression
If else expressions
If else if ladder expressions
Nested if expression

3. if
If is used when a block of code
must be executed based on the
condition to be true
else
else is used when a block of
code must be executed if the
same condition is false
else if
else if is used to specify a new
condition if the previous condition
is false
Conditionals in Kotlin

4. Different types of if else expressions
If expression
If else expression
If else if ladder expression
Kotlin Nested If expression
01
02
03
04
02
03
04
02
03
01
02
03
04

5. if expressions
The if expression is used to check the condition, if the
condition is true then only the code mentioned inside the if
block will execute.
If code
False
True
Exit
Start
Condition

6. if else expressions
In if-else expression, there are two blocks of statements,
the if block executes when the condition is true, and if
the condition is false, then the else block executes.
In if-else expression, there are two blocks of
statements, the if block executes when the condition is
true, and if the condition is false, then the else block
executes.
If block
False
True
Exit
Start
Condition
else block

7. if else if ladder expressions
Kotlin if else if condition is used when there are multiple
conditions to be checked.
In this expression first the if expression is checked if its true
then it executes that if block otherwise it moves to other else if
conditions.
If none of the condition turns out to be true then it executes the
last final else expression.
fun main()
{
val marks = 117
val result = if (marks < 105 && marks
>80)
{
"Cutoff not cleared( 2nd exam)"
}
else if (marks in 105..130)
{
"Cutoff cleared"
}
else if (marks in 130..180)
{
"Cutoff cleared (No fee)"
} else {
“Cutoff not cleared"
}
println(result)
}

8. Nested if expressions
In Kotlin nested if expression, there are if statements inside another if
statement.
First the if expression is checked if it is true then the nested if
condition is checked. If the condition turns out to be false then it will
move to the else expression.
fun main()
{
val num = 30
if(num>0)
{
if(num%2 == 0)
println("Even Number")
else
println("Odd Number")
}
else {
println("Negative number")
}
}