Go variables, constants, slices, maps, control flow, functions, multiple returns, defer and zero values.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- How do you declare a variable with explicit type in Go?
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Using the var keyword, e.g., var x int- What does the := operator do in Go?
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It declares and initializes a variable with inferred type in one step (short declaration)- Can you declare multiple variables at once using var in Go?
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Yes, var a, b, c int declares three int variables at once- What is the blank identifier (_) used for when declaring variables?
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To ignore or discard a value, so the compiler does not require it to be used- Does a Go program compile if you declare a variable but never use it?
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No, Go does not allow unused variables and will produce a compile error- What keyword is used to declare a constant in Go?
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The const keyword, e.g., const PI = 3.14- Are constants in Go always typed, or can they be untyped?
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Constants can be untyped. Untyped constants have a kind but no explicit type until assigned.- What is the iota identifier used for in Go?
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iota generates successive integer constants, starting at 0 and incrementing with each const line- How do you create an enumeration-style group of related constants?
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Use a const block with iota, e.g., const (RED = iota; BLUE; GREEN)- What is the zero value for the int type in Go?
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0- What is the zero value for the string type in Go?
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An empty string (empty double quotes)- What is the zero value for the bool type in Go?
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false- What is the zero value for a pointer type in Go?
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nil- What is the zero value for a slice in Go?
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nil- How do you declare a slice type in Go?
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Using square brackets without a fixed size, e.g., []int or []string
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