Exercise 1

Question

Write a program where you declare an integer variable called i with the value 20. Assign i to a floating point variable named f. Print out i and f.

Solution

The key here is that you need to use a type conversion to convert i to a float64 so it can be assigned. Go doesn't have automatic type promotion. Notice in our code that you don't need to specify the type for i or f; it can be inferred from the right hand side. The default type for an integer literal is int, so i's type can be inferred. The float64 type conversion on the right hand side of f's declaration specifies f's type.