Null Pointer Exception in Shipping Calculator. For JAVA and KOTLIN experts...

Question

From nowhere this error is getting popped up for me. Kindly help me overcome this:
CODE:-
fun shippingCost(amount: Double, international: Boolean): Double {
var a: Double
if(international==true)
{
if(amount>=75.0)
{
a=amount*0.15
if(a>50.0)
{
a=50.0
return a
}
else
{
return a
}
}
}
if(amount>=75.0 && international==false)
{
a=0.0
return a
}
else
{
a=amount/10.0
return a
}
return 0.0
}
fun main(args: Array<String>) {
val total = readLine()!!.toDouble()
val international = readLine()!!.toBoolean()
println(shippingCost(total, international))
}
ERROR:-
Exception in thread "main" java.lang.NullPointerException
at File0Kt.main(file0.kt:33)

Answer 1

Vishnuvasan Srinivasan

This is for kotlin

fun shippingCost(amount: Double, international: Boolean): Double {

if(international == true){
if(amount * 0.15 < 50){
return amount * 0.15
}else{
return 50.0
}
}else{

if(amount > 75){
return 0.0
}else{
return amount * 0.1
}
}
}
fun main(args: Array<String>) {
val total = readLine()!!.toDouble()
val international = readLine()!!.toBoolean()
println(shippingCost(total, international))
}

Answer 2

Sathe Prerana Satish Thank you very much sis...

Answer 3

I tried your code but didn't get that error. Did you put the values on separate line when giving input before run?

https://code.sololearn.com/WhiNb9BkJUVC/?ref=app

Answer 4

Ipang
Yes I did.
If you got the output can you share that?

Answer 5

Ok give me some input examples to test which triggered the error on your side. Let me try to reproduce the symptom ...

Answer 6

Dude...
All the test cases failed in my case.

Answer 7

That's really bad
Maybe someone who went through this task can help you out later.

Answer 8

Oh..😢

Answer 9

I recall someone posted a question about this shipping cost problem. Maybe you can search for that one and see the solution.

Answer 10

Ipang Thanks bro...

Answer 11

Yeah good luck finding bro ... 👌

Answer 12

Vishnuvasan Srinivasan
Most welcome bro
Is it works

Answer 13

Yes. It does.

Answer 14

Vishnuvasan Srinivasan
Ok great