Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Eager evaluation or greedy evaluation is the evaluation strategy in most traditional programming languages. In eager evaluation an expression is evaluated as soon as it gets bound to a variable. The term is typically used to contrast lazy evaluation, where expressions are only evaluated when evaluating a dependent expression. Eager evaluation is almost exclusively used in imperative programming languages where the order of execution is implicitly defined by the source code organization. One advantage of eager evaluation is that it eliminates the need to track and schedule the evaluation of expressions. It also allows the programmer to dictate the order of execution, making it easier to determine when sub-expressions (including functions) within the expression will be evaluated, as these sub-expressions may have side-effects that will affect the evaluation of other expressions.

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