fortran - How to interpret dots in an if statement? -


what dots mean in following code?

if ((tau.ge.dts).and.(tau.le.(dts+dth)))   = b+c end

before fortran90, dots required around operators. can use >= instead of .ge. , <= instead of .le.. being 1 of oldest languages, there lot of things still carried through , supported - spacing , operators among more interesting features.

fortran90 new features (see relational operators): https://gcc.gnu.org/onlinedocs/gcc-3.4.4/g77/fortran-90-features.html


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