根据其他条件设置变量[重复]

Question

This question already has an answer here:

• Why does golang compiler think the variable is declared but not used? 1 answer

I want to set a string to one of two things based on an if/else statement:

    var output string
    password, ok := m["password"]
    if ok {
            output := runcmd("connect.sh "+ssid+" "+password)
    } else {
            output := runcmd("connect.sh "+ssid)
    }
    fmt.Println(output)

During compile I get back:

output declared and not used

I understand that this is because output is a local variable inside ok { ... }, what would the proper way to do this be?

Also tried using a capital for Output as I've had to do that to make struct properties accessible before.

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Answer 1

Remove the : before = in the if/else statement.

Using := in a if statement with the variable declared above, it means you redeclare the variable in that scope. If you will use = this would mean assignment into the already declared variable output.

Read about it here: Short variable declarations vs Assignmets