FORTRAN Language

It stands for  FORmulaTRANslation. FORTRAN was developed  in the 1950-s by a team of IBM

programmers led by John Backus and released in 1957.Fifty years later, FORTRAN remains the

programming language of choice for large-scale numerical calculations in science and engineering.

FORTRAN was the world's first high-level programming language. It is not a case sensitive language.

IMPORTANT KEY POINTS

Ø  File name must be start  from an Alphabet.

Ø  Variable name must be start from an Alphabet.

Ø  Back slash  (  \  )  is used  for division in Fortran.

Ø  Double asterisk  (  ** )  is used for power.    e.g.   = 2 ** 3

Ø  I,J,K,L,M,N  are by default integer variables.

IN MATHEMATICS                  |                      IN  FORTRAN

    <                                                        =                                               .LT.

    ≤                                                        =                                               .LE.  

    >                                                        =                                               .GT.

    ≥                                                        =                                               .GE.

    =                                                        =                                               .EQ.

    ≠                                                        =                                               .NE.

AND  , OR , NOT                                  =                                      .AND.        .OR.       .NOT.