ALGO is an algebraic programming language developed between 1959 and 1961 for

the Bendix G-15 computer.

ALGO was one of several programming languages inspired by the Preliminary Report on

the Language written in Zürich in 1958. This report underwent several modifications

before becoming the Revised Report on which most ALGOL implementations are based.

As a result, ALGO and other early "ALGOLs" have a very different syntax from ALGOL

60.

Other languages developed from the Zürich report include BALGOL, MAD (Michigan

Algorithm Decoder) and NELIAC.

Contents

  [hide] 

1 Exampleo 1.1 Remarks

2 See also 3 External links

Example[edit]

Here is the Trabb Pardo-Knuth algorithm in ALGO:

1. TITLE TRABB PARDO-KNUTH ALGORITHM 2. SUBSCript I,J 3. DATA

A(11) 4. FORMAt FI(2DT), FLARGE(3D) 5. PROCEdure F(T=Z) 6. BEGIN

7. Z=SQRT(ABS(T))+5*T^3 8. END 9. FOR I=0(1)10 10. A[I]=KEYBD 11.

FOR J=0(1)10 BEGIN 11. I=J-10 12. F(A[I]=Y) 13. PRINT(FI)=I 14.

IF Y > 400 15. GO TO LARGE 16. PRINT(FL)=Y 17. GO TO NEXT 18.

LARGE: PRINT(FLARGE)=999 19. NEXT: CARR(1) END 20. END

Remarks[edit]

1. A title is the only type of comment allowed. Line numbers were inserted by the

editor.

2. Integer data type. The lower-case letters are not typos, but reflect the way in which

ALGO code was presented in the original documentation.

3. Only the size of an array can be specified, lower bound is always zero.

4. The first format calls for a two-digit number followed by a tab, the second for a

three digit number.

5. The syntax of ALGO's procedure implementations is slightly different from that

given in the Zurich report. Functions as defined by the Zürich report are not

implemented.

9. The syntax here is from the Zürich report and is also consistent with various

1950s-era autocodes.

10. KEYBD reads a numeric value from the terminal.

See also[edit]

Look up algo in

Wiktionary, the free

dictionary.

ALGOL 58

ALGOL 60

External links[edit]