Symbol Epsilon

∊ — is an Element of — Keystroke is usually Alt-e; Character(⎕UCS) 8714

Examples

      5 ∊ 1 2 3 4 5    ⍝ determine if 5 is an element of the set of numbers from 1 through 5, result just below 1 = Yes or true, so 5 IS an element of 1 through 5.
1

      1 2 3 4 5 ∊ 5    ⍝ determine if the set of numbers from 1 through 5 contains the integer 5. Results 0=False, 1=True
0 0 0 0 1 

      (⍳5) ∊ 5      ⍝ determine if the set of numbers from 1 through 5 (iota 5) contains the integer 5.
0 0 0 0 1 

      'this is text' ∊ 't'      ⍝ determine if a text phrase contains the letter 't', 1=True, 0=False
1 0 0 0 0 0 0 0 1 0 0 1 

See Also

{{#ifeq:{{{en}}}|4||title="match" style="border-width:thick; border-color:blue; background-color:yellow;"|≡ {{#ifeq:{{{en}}}|7||title="iota" style="border-width:thick; border-color:blue; background-color:yellow;" |⍳ {{#ifeq:{{{en}}}|9||title="slash" style="border-width:thick; border-color:blue; background-color:yellow;" |/ {{#ifeq:{{{en}}}|11||title="diamond" style="border-width:thick; border-color:blue; background-color:yellow;" |⋄ {{#switch: {{{en}}}

NARS 2000 Lang Tool Bar {{#ifeq:{{{en}}}|1||title="assign" style="border-width:thick; border-color:blue; background-color:yellow;" |←

→

bgcolor=cyan

title="assign" |←

→

}} {{#ifeq:{{{en}}}|2||title="plus" style="border-width:thick; border-color:blue; background-color:yellow;" |+

-

×

÷

*

⍟

⌹

○

!

?

√

bgcolor=cyan

title="plus" |+

-

×

÷

*

⍟

⌹

○

!

?

√

}} {{#ifeq:{{{en}}}|3||title="mod" style="border-width:thick; border-color:blue; background-color:yellow;" ||

⌈

⌊

⊥

⊤

⊣

⊢

⌈

⌊

⊥

⊤

⊣

⊢

≢

<

≤

=

≥

>

≠

bgcolor=cyan

title="match" |≡

≢

<

≤

=

≥

>

≠

}} {{#ifeq:{{{en}}}|5||title="down caret" style="border-width:thick; border-color:blue; background-color:yellow;" |∨

∧

⍱

⍲

bgcolor=cyan

title="down caret" |∨

∧

⍱

⍲

}} {{#ifeq:{{{en}}}|6||title="take" style="border-width:thick; border-color:blue; background-color:yellow;" |↑

↓

⊂

⊃

⌷

⍋

⍒

↓

⊂

⊃

⌷

⍋

⍒

∊

⍸

⍷

∪

∩

⊆

⊇

~

§

π

..

bgcolor=cyan

title="iota" |⍳

∊

⍸

⍷

∪

∩

⊆

⊇

~

§

π

..

}} {{#ifeq:{{{en}}}|8||title="comma" style="border-width:thick; border-color:blue; background-color:yellow;" |,

⍪

⍴

⌽

⊖

⍉

⍪

⍴

⌽

⊖

⍉

\

⌿

⍀

⊙

¨

⍨

⍤

⍡

⍥

⍦

.

∘

⍠

‼

⌻

∂

∫

bgcolor=cyan

title="slash" |/

\

⌿

⍀

⊙

¨

⍨

⍤

⍣

⍡

⍥

⍦

.

∘

⍠

‼

⌻

∂

∫

}} {{#ifeq:{{{en}}}|10||title="quotequad" style="border-width:thick; border-color:blue; background-color:yellow;" |⍞

⎕

⍎

⍕

⎕

⍎

⍕

⍝

∇

∆

⍙

_

⍺

⍵

bgcolor=cyan

title="diamond" |⋄

⍝

∇

∆

⍙

_

⍺

⍵

}} {{#ifeq:{{{en}}}|12||title="neg" style="border-width:thick; border-color:blue; background-color:yellow;" |¯

⍬

∞

title="neg" |¯

⍬

∞

∅

colspan=8 |Second Row

i j k

a

b

e

g

p

r

v

x

z

colspan=8 |Second Row

i j k

a

b

e

g

p

r

v

x

z

colspan=8 |Second Row

i j k

a

b

e

g

p

r

v

x

z

colspan=6 |Second Row

i j k

i j k l

g

p

r

v

x }}