Programming in Kotlin - Part 25: More Nullables | Ray Wenderlich

Official Tutorials
1

Learn how to unwrap Nullables, force unwrap Nullables, and use the let statement.

This is a companion discussion topic for the original entry at https://www.raywenderlich.com/4736-programming-in-kotlin/lessons/25
2

Can u explain the let syntax?i am not able to understand the syntax of let function

3

The let function is used on nullable variables. It allows you to safely use the variable in other calls.
For example:
var name: String? = “My Name”
name?.let {
it.toLowerCase()
}

you can also give “it” a name:
name?.let { nonNullableName →
nonNullableName.toLowerCase()
}