Kotlin variable usage "variable must be initialize"

Question

can someone explain can solve this problem in kotlin? Thank you very much

var weight = rweight.text.toString().toFloat()
var hct = rhct.text.toString().toFloat()
var EBV :Float
var ABL :Float

if (rman.isChecked){
    EBV = weight * 75
} else if (rwoman.isChecked) {
    EBV = weight * 65
}
ABL = EBV * (10)/hct  //error in here "EBV must be initialize"

try initializing it to something like var EBV: Float = 0.0? I think both your if and else if are not true so EBV is null in that line. — Phani Rithvij
– Phani Rithvij, Commented Jul 27, 2020 at 6:10
@PhaniRithvij yes, thank you very much for the answer. The problem is in my code. — Rozi Akbar
– Rozi Akbar, Commented Jul 27, 2020 at 8:03

Sergio · Accepted Answer · 2020-07-27 06:03:30Z

2

You receive that error because EBV may not be initialized when it is used.

You should initialize EBV variable with default value:

var EBV: Float = 0.0f // or some other default value

Or add else clause to the condition:

EBV = if (rman.isChecked) {
    weight * 75
} else if (rwoman.isChecked) {
    weight * 65
} else {
    0.0f // assign some value to the variable
}

// As improvement you can replace `if` with `when` statement:

EBV = when {
    rman.isChecked -> weight * 75
    rwoman.isChecked -> weight * 65
    else -> 0.0f // assign some value to the variable
}

edited Jul 27, 2020 at 6:03

answered Jul 27, 2020 at 5:53

Sergio

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1 Comment

Rozi Akbar Over a year ago

Thanks a lot. The second method that uses "when" is work for me.

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