Scalars The scalar variables hold only one value, which may be a numeric literal, or a string literal. Scalar variable names always begin with a $ sign.是什么意思_Scalars The scalar variables hold only one value, which may be a numeric literal, or a string literal. Scalar variable names always begin with a $ sign.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句