expr

expr is a command line Unix utility which evaluates an expression and outputs the corresponding value. It first appeared in Unix v7.

Syntax: expr (expression)

expr evaluates integer or string expressions, including pattern matching regular expressions. Most of the challenge posed in writing expressions is preventing the invoking command line shell from acting on characters intended for expr to process.

词汇	expr
分类	英语词汇英语翻译词典
释义	expr 原声例句修道士（下） The affection which She had ever exprest for him, warranted this persuasion: But He resolved that should She prove obstinate, no consideration whatever should prevent him from enjoying her. 她一直对他表达的爱意使他有这样的说服力：但他决定，如果她表现得固执己见，任何考虑都不能阻止他享受她。修道士（下） The concern exprest upon Lorenzo's countenance, the frantic fondness of his complaints, and his earnest enquiries respecting her wounds, convinced her beyond a doubt that his affections were her own. 洛伦佐脸上流露出的关切，他对抱怨的狂热喜爱，以及他对她伤口的认真询问，使她确信他对她的感情是深切的。英语百科 expr expr is a command line Unix utility which evaluates an expression and outputs the corresponding value. It first appeared in Unix v7. Syntax: `expr (expression)` expr evaluates integer or string expressions, including pattern matching regular expressions. Most of the challenge posed in writing expressions is preventing the invoking command line shell from acting on characters intended for expr to process.
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