eq, neq.gt,ge,lte,lt,not,mod的含义

lt：less than 小于
lte、le：less than or equal to 小于等于
eq：equal to 等于
ne、neq：not equal to 不等于
gte、ge：greater than or equal to 大于等于
gt：greater than 大于

not非   
mod求模  
is [not] div by是否能被某数整除 
is [not] even是否为偶数  
is [not] even by $b即($a / $b) % 2 == 0   
is [not] odd是否为奇   is not odd by $b即($a / $b) % 2 != 0