BasicList #? ZZ -- check for element in list

BasicList #? ZZ -- check for element in list

x#?i -- tells whether there is an i-th element in the list x.

i1 : {a,b,c} #? 2



o1 = true

i2 : {a,b,c} #? 22



o2 = false

See also:

BasicList # ZZ -- get element from list

Synopsis of use:

Operator: #?

Class of argument 1: BasicList

Class of argument 2: ZZ

Class of typical returned value: Boolean