Programming Errors and Concepts

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Syntax error

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A mistake in typed code that violates the rules of the programming language. Typically, code with syntax errors will not run.

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Logic error

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A mistake in an algorithm or program that causes it to behave unexpectedly or return the incorrect value.

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Run-time error

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A mistake in a program that happens only when the program is actually run, such as a program attempting to access memory that does not exist.

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Overflow error

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Error that results when the number of bits is not enough to represent the number (like a car’s odometer 'rolling over').

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Bit

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A binary digit, either 0 or 1.

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Byte

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A sequence of 8 bits.

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Roundoff

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Error that results when the number of bits is not enough to represent the number with full precision (like using 3 digits to represent π as 3.14).

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Analog data

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Values that change smoothly, rather than in discrete intervals, over time. For example, the pitch and volume of a live concert.

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Lossless compression

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Compressing data in a way that preserves all data away and allows full recovery of the original.

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Lossy compression

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Compressing data in a way that discards some data and makes it impossible to recover the original.