4.Scala中的算数运算符

println(2+1) // 3
println(2-1) // 1
println(2*3) // 6
println(5/2) // 2
println(5/2.0) //Int / Double还是Double

println(5%2)
println(123%10)

println(3 == 2)
println(3 != 2)
println(3 > 2)
println(3 < 2)
println(3 >= 2)
println(3 <= 2)