How can you manage program behavior during its execution in Go?

In the Go language, program behavior during runtime can be controlled in several ways:

• Conditional statements (if, switch) — allow executing different blocks of code depending on conditions.
• Loops (for) — for repeating actions.
• Error handling using return values and the if err != nil construct.
• Panic and recover (panic and recover) — for handling critical errors and recovering from them.
• Goroutines and channels — for managing concurrency and synchronization.
• Interfaces and polymorphism — for changing behavior through different implementations.

Example of using a conditional statement and error handling:

if err := doSomething(); err != nil {
    fmt.Println("Error:", err)
    return
}

if value > 10 {
    fmt.Println("Value is greater than 10")
} else {
    fmt.Println("Value is 10 or less")
}