Note that the words that compare for equality (```
= <> 0= 0<> d= d<>
d0= d0<>
```

) work for for both signed and unsigned numbers.

`<`

(n1 n2 – f) core “less-than”

`<=`

(n1 n2 – f) gforth-0.2 “less-or-equal”

`<>`

(n1 n2 – f) core-ext “not-equals”

`=`

(n1 n2 – f) core “equals”

`>`

(n1 n2 – f) core “greater-than”

`>=`

(n1 n2 – f) gforth-0.2 “greater-or-equal”

`0<`

(n – f) core “zero-less-than”

`0<=`

(n – f) gforth-0.2 “zero-less-or-equal”

`0<>`

(n – f) core-ext “zero-not-equals”

`0=`

(n – f) core “zero-equals”

`0>`

(n – f) core-ext “zero-greater-than”

`0>=`

(n – f) gforth-0.2 “zero-greater-or-equal”

`u<`

(u1 u2 – f) core “u-less-than”

`u<=`

(u1 u2 – f) gforth-0.2 “u-less-or-equal”

`u>`

(u1 u2 – f) core-ext “u-greater-than”

`u>=`

(u1 u2 – f) gforth-0.2 “u-greater-or-equal”

`within`

(u1 u2 u3 – f) core-ext “within”

u2<u3 and u1 in [u2,u3) or: u2>=u3 and u1 not in [u3,u2). This works for
unsigned and signed numbers (but not a mixture). Another way to think
about this word is to consider the numbers as a circle (wrapping
around from `max-u`

to 0 for unsigned, and from `max-n`

to
min-n for signed numbers); now consider the range from u2 towards
increasing numbers up to and excluding u3 (giving an empty range if
u2=u3); if u1 is in this range, `within`

returns true.

`d<`

(d1 d2 – f) double “d-less-than”

`d<=`

(d1 d2 – f) gforth-0.2 “d-less-or-equal”

`d<>`

(d1 d2 – f) gforth-0.2 “d-not-equals”

`d=`

(d1 d2 – f) double “d-equals”

`d>`

(d1 d2 – f) gforth-0.2 “d-greater-than”

`d>=`

(d1 d2 – f) gforth-0.2 “d-greater-or-equal”

`d0<`

(d – f) double “d-zero-less-than”

`d0<=`

(d – f) gforth-0.2 “d-zero-less-or-equal”

`d0<>`

(d – f) gforth-0.2 “d-zero-not-equals”

`d0=`

(d – f) double “d-zero-equals”

`d0>`

(d – f) gforth-0.2 “d-zero-greater-than”

`d0>=`

(d – f) gforth-0.2 “d-zero-greater-or-equal”

`du<`

(ud1 ud2 – f) double-ext “d-u-less-than”

`du<=`

(ud1 ud2 – f) gforth-0.2 “d-u-less-or-equal”

`du>`

(ud1 ud2 – f) gforth-0.2 “d-u-greater-than”

`du>=`

(ud1 ud2 – f) gforth-0.2 “d-u-greater-or-equal”