###### tags: `C++` `conditional expressions and loop` # 1. for ## 1. for(int i; i; i- -) //遞減時 i>0 是預設值 可省略>0 直接寫i (2022-6實作1) ![](https://i.imgur.com/K7XqYWv.png) 參考 https://hackmd.io/@thanksone/APCS20220612?fbclid=IwAR3Dms2d0E_EQo62eJdeHShrRXFn1G13HRVjwtuaQRZ1ZLHVR4jFI6U4-Jk#%E6%95%B8%E5%AD%97%E9%81%8A%E6%88%B2