# 018. Fortran has a one-line `if` topic: {ref}`conditionals` In addition to `if`-`else if`, Fortran has a one-line `if`: ```text if (condition) executable_statement ``` ```{literalinclude} ../../src/if-one-line.f90 :language: fortran :caption: if-one-line.f90 | |

``` ```{code-block} text :caption: Output[^gfortran-version] -1 -1 -1 -1 1 1 1 1 ``` [^gfortran-version]: Compiled using `GNU Fortran (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0` with no flags ---

In addition to if-elseif, Fortran has a one-line if:
if (condition) executable_statement

integer :: i
do i=-1,1
if (i /= 0) print*,i,1/i ! one-line if equivalent to below
if (i /= 0) then
print*,i,1/i
end if
end do
end
! output:
! -1 -1
! -1 -1
! 1 1
! 1 1
— FortranTip (@fortrantip) December 19, 2021