什么是弱类型程序设计语言

网络 2021-08-18 19:37:58 1 1,829

弱类型程序设计语言也称为弱类型定义语言,与强类型定义相反。像JavaScript、vb、php等就属于弱类型语言。弱类型语言与强类型语言的主要区别有以下两点。

(1)弱类型语言,变量没有各类之分,变量的声明用关键字var,为变量赋值时会自动判断类型并进行转换;强类型语言,变量类型有多种,并且变量只能接受与之相同的数据类型。

(2)弱类型语言,变量间不需要显式转换。例如,将字符串12和整数3进行相减,得到数值9,而不需要显式转换。


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    发布于 2021/12/16 22:06