Challenge Library
Coding Challenges
5,893 curated questions across every arena — browse by topic, then jump into a live 2-minute battle to put them to the test.
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5,893 challenges total
- Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Code AnalysisIntermediate
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goanalysisintermediate - Multiple ChoiceBeginner
Go: Package Main
gobeginner - Multiple ChoiceBeginner
Go: Import
gobeginner - Multiple ChoiceBeginner
Go: fmt.Println
gobeginner - Multiple ChoiceBeginner
Go: var declaration
gobeginner - Multiple ChoiceBeginner
Go: Short Declaration
gobeginner - Multiple ChoiceBeginner
Go: Zero Values
gobeginner - Multiple ChoiceBeginner
Go: String Zero Value
gobeginner - Multiple ChoiceBeginner
Go: bool type
gobeginner - Multiple ChoiceBeginner
Go: if statement
gobeginner - Multiple ChoiceBeginner
Go: for loop
gobeginner - Multiple ChoiceBeginner
Go: for range
gobeginner - Multiple ChoiceBeginner
Go: switch
gobeginner - Multiple ChoiceBeginner
Go: defer (b13)
gobeginner - Multiple ChoiceBeginner
Go: Slice Declaration
gobeginner - Multiple ChoiceBeginner
Go: Array Declaration
gobeginner - Multiple ChoiceBeginner
Go: Map Declaration
gobeginner - Multiple ChoiceBeginner
Go: append (b17)
gobeginner - Multiple ChoiceBeginner
Go: len
gobeginner - Multiple ChoiceBeginner
Go: cap
gobeginner - Multiple ChoiceBeginner
Go: make (b20)
gobeginner - Multiple ChoiceBeginner
Go: new (b21)
gobeginner - Multiple ChoiceBeginner
Go: Pointer
gobeginner - Multiple ChoiceBeginner
Go: Address-of
gobeginner - Multiple ChoiceBeginner
Go: Dereference
gobeginner - Multiple ChoiceBeginner
Go: Nil Pointer
gobeginner - Multiple ChoiceBeginner
Go: Struct Declaration
gobeginner - Multiple ChoiceBeginner
Go: Struct Literal
gobeginner - Multiple ChoiceBeginner
Go: Exported Names
gobeginner - Multiple ChoiceBeginner
Go: Multiple Return
gobeginner - Multiple ChoiceBeginner
Go: Blank Identifier
gobeginner - Multiple ChoiceBeginner
Go: Error Type
gobeginner - Multiple ChoiceBeginner
Go: nil error
gobeginner - Multiple ChoiceBeginner
Go: if with init
gobeginner - Multiple ChoiceBeginner
Go: go fmt
gobeginner - Multiple ChoiceBeginner
Go: go build
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Every challenge here is drawn from the live Code Royale pool. Review a question, then head to the arena to answer under pressure against a real opponent — 2-minute matches, Elo ranking, and badge tiers on the line.