FD1D_HEAT_EXPLICIT is a FORTRAN90 program which solves the time-dependent 1D heat equation, using the finite difference method in space, and an explicit version of the method of lines to handle integration in time. -FD1D_HEAT_EXPLICIT is a FORTRAN90 program which solves the time-dependent 1D heat equation, using the finite difference method in space, and an explicit version of the method of lines to handle integration in time.