Update 110-type-casting.md

Added some code examples. Golang roadmap looks incomplete without them.

src/data/roadmaps/golang/content/100-go-basics/110-type-casting.md

@@ -2,6 +2,43 @@
 
 Go doesn't support automatic type conversion, but it allows type casting, which is the process of explicitly changing the variable type.
 
+Creating variables that share same data, but with different types:
+```go
+var PI float32 = 3.14159
+// var b int = PI // (compiler IncompatibleAssign error)
+var b int = int(PI)
+```
+Same is true for expressions with different data types:
+```go
+var PI float32 = 3.14159
+var times int = 32;
+// c := (PI*times) // (compiler MismatchedTypes error)
+c := (PI*float32(times))
+```
+For functions:
+```go
+package main
+
+import (
+  . "math"
+)
+func main(){
+    var PI float32 = 3.14159
+    var rotations int = int(float32(32)*PI);
+    result := Sin(float64(rotations))) // Conversion is necessary, because math.Sin function has float64 argument
+}
+```
+Integers and floats of different types must be casted as was shown earlier:
+```go
+var a int = 42
+var b int32 = 8
+var c int = a+int(b)
+
+var d float64 = 24.0
+var e float32 = 6.0
+var f float64 = a+float64(b)
+```
+
 Visit the following resources to learn more:
 
 - [@official@Tour of Go: Type Casting Basics](https://go.dev/tour/basics/13)