isMember -- test membership in a list or set

Synopsis

• Usage:

  isMember(e,x)

• Inputs:
  • e, a thing,
  • x, a list, a sequence, or a set,
• Outputs:
  • a Boolean value, whether e is in the list, sequence, or set x;

Description

i1 : isMember(c,{a,b,c,d,e})

o1 = true

i2 : isMember(f,(a,b,c,d,e))

o2 = false

i3 : isMember(3,set{1,2,5,6})

o3 = false

See also

• positions -- which elements of a list satisfy a condition
• Set -- the class of all sets