Update if.go
Update if.go

yukihirai0505/tutorial-program,yukihirai0505/tutorial-program,yukihirai0505/tutorial-program,yukihirai0505/tutorial-program,yukihirai0505/tutorial-program,yukihirai0505/tutorial-program,yukihirai0505/tutorial-program,yukihirai0505/tutorial-program,yukihirai0505/tutorial-program