R语言中if判断语句

num = 8
if (num %% 2 == 0)
{
 print("even!") 
}

num = 7
if (num %% 2 == 0)
{
 print("even!") 
}

num = 7
if (num %% 2 == 0)
{
  print("even!")
} else
{
  print("odd!")
}

for (i in 1:10)
{
 if (i %% 2 == 0)
 {
   print(i)
 }
}

score <- 88
if (score >= 0 & score < 60)
{
 print("failed") 
} else
if (score >= 60 & score < 70) 
{
  print("pass") 
} else
if (score >= 70 & score < 90)
{
  print("brilliant")
} else
if (score >= 90 & score <= 100)
{
  print("excellant!")
} else
{
  print("input error")
}