讲课笔记～

拆不散D大熊小熊

Memory addressing and variablesmemory addressing is like a  excel cell and we could put different value into it. Also it is very easy to find it like A1 A3: )

(An Excel sheet consists of cells. Each cell has its own unique identifier)

if you add number with string the output must be string (If you add a number and a string, the number is converted to a string)