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Program to find prime numbers between two integers

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C      Program to find prime numbers between two integers
        write(*,*)'Enter the limits:'
        read(*,*)m,n
        if (m.gt.n)then
        temp=m
        m=n
        n=temp
        end if
        i=m
        print*,'The prime numbers between are given below:'
 20   do j=2,i/2
        r=mod(i,j)
        if(r.eq.0)goto 10
        end do
        write(*,*)i
 10   if(i.lt.n)then
        i=i+1
        goto 20
        end if
        end
       
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