<s>
Euler	B-Language
is	O
a	O
programming	O
language	O
created	O
by	O
Niklaus	O
Wirth	O
and	O
Helmut	O
Weber	O
,	O
conceived	O
as	O
an	O
extension	O
and	O
generalization	O
of	O
ALGOL	B-Language
60	I-Language
.	O
</s>
<s>
Available	O
sources	O
indicate	O
that	O
Euler	B-Language
was	O
operational	O
by	O
1965	O
.	O
</s>
<s>
Euler	B-Language
employs	O
a	O
general	O
data	O
type	O
concept	O
.	O
</s>
<s>
In	O
Euler	B-Language
,	O
arrays	O
,	O
procedures	O
,	O
and	O
switches	O
are	O
not	O
quantities	O
which	O
are	O
declared	O
and	O
named	O
by	O
identifiers	O
:	O
in	O
contrast	O
to	O
ALGOL	B-Language
,	O
they	O
are	O
not	O
quantities	O
on	O
the	O
same	O
level	O
as	O
variables	O
.	O
</s>
<s>
Thus	O
,	O
besides	O
the	O
traditional	O
numeric	O
and	O
logical	O
constants	O
,	O
Euler	B-Language
introduces	O
several	O
added	O
types	O
:	O
</s>
<s>
All	O
constants	O
can	O
be	O
assigned	O
to	O
variables	O
,	O
which	O
have	O
the	O
same	O
form	O
as	O
in	O
ALGOL	B-Language
,	O
but	O
for	O
which	O
no	O
fixed	O
types	O
are	O
specified	O
:	O
Euler	B-Language
uses	O
dynamic	O
typing	O
.	O
</s>
<s>
If	O
the	O
elements	O
are	O
procedures	O
,	O
a	O
procedure	O
list	O
is	O
obtained	O
,	O
which	O
is	O
unavailable	O
in	O
ALGOL	B-Language
60	I-Language
.	O
</s>
<s>
Euler	B-Language
provides	O
general	O
type-test	O
and	O
type-conversion	O
operators	O
.	O
</s>
