package variable
//定义范围Range 继承于List
def range=1..10
println(range[3])//4
println(range.contains(3))//true
println(range.from)//1
println(range.to)//10
Range range1 //定义
//遍历
range.each {//闭包
println( it)
}
for(i in range){
println(i)
}
def reslt=getGrade(75)
def getGrade(Number number){
def resultswitch (number){ case 0..60:
result='不及格'
break
case 60..<70:
result='及格'
break
case 70..<80:
result='良好'
break
case 80..100:
result='优秀'
break}
result //return 可以不写}
println(reslt)//良好