How many functions are there in Fortran?

There are some functions which are written into FORTRAN and can be used without any special effort by you, the programmer. They are called intrinsic functions. There are over 40 intrinsic functions in FORTRAN and they are mainly concerned with mathematical functions.
For More Information Please Refer:
http://www.chem.ox.ac.uk/fortran/subprograms.html
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