Lecture_notes_summary1

# Lecture_notes_summary1 - Chapter 1 The Program Algorithm 1...

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Chapter 1 The Program Algorithm 1 First example Our first example consists of the following algorithm: 1: i 2 2: j 2 3: k i + j 4: PRINT k FIRST EXAMPLE PROGRAM FIRST EXAMPLE INTEGER : : i , j , k i=2 j=2 k=i+j WRITE ( , ) k END FIRST EXAMPLE Save as FIRST EXAMPLE.f95 FIRST EXAMPLE Commands and Output gfortran FIRST EXAMPLE. f95 ./ a . out 4 FIRST EXAMPLE Commands and Output gfortran FIRST EXAMPLE. f95 o FIRST EXAMPLE FORTRAN ./FIRST EXAMPLE FORTRAN 4 3

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MAT 5939-03 Pierre Garreau 1.1 Description of a program Fortran Programs all start with PROGRAM PROGRAM NAME and end with END PROGRAM PROGRAM NAME INTEGER :: i,j,k declares i,j, and k as integers. i=2,j=2 assign the value of 2 to i and j. k=i+j adds i and j and assigns the value of k. WRITE ( , ) k prints the value of k to the screen. 1.2 Compiling and running Save file with a .f90 ending to signify that it is a fortran 90 program.
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