Kotlin Blueprints

Using datatypes and conversion

In Kotlin, everything is an object. Kotlin has pretty much the same number of related data types compared to Java. But they are not exactly the same.

In Java, the following is true:

    int num=10;    double bigNum=num;

But in Kotlin if you try to do such a thing it will give a compile-time error. This means implicit widening is not allowed in Kotlin. However, the main thing we want to discuss in this section is, with every number type Kotlin supports some explicit conversion and that can fill the gap of not having an implicit widening feature. Also, we often use utility methods from Java wrapper classes such as Integer.parseInt(), Float.valueOf(), and so on.

Every number type supports the following conversions: