Not Enough Arguments in Function Call

Why This Happens

Go requires you to provide exactly the number of arguments a function expects. If you forget an argument, the compiler reports this error. This often happens when a function is updated to take an additional parameter but not all call sites are updated.

The Problem

func greet(name string, age int) string {
    return fmt.Sprintf("%s is %d", name, age)
}

func main() {
    msg := greet("Alice") // not enough arguments
    fmt.Println(msg)
}

The Fix

func main() {
    msg := greet("Alice", 30)
    fmt.Println(msg)
}

Step-by-Step Fix

1. 1

   Identify the function

   Read the error to find which function is missing arguments.

2. 2

   Check the signature

   Look at the function definition to see all required parameters.

3. 3

   Provide missing arguments

   Add the missing arguments at the call site with appropriate values.