^的意思就是让你一直加下去,知道有一项足够小未知
另外,你的公式少了一个1,如果要算出正确的e值,应该把下面程序中result的初始值改成1
object Test {
def main(args:Array[String]) {
var result:Double = 0.0
var term:Double = 1.0
val tolerance:Double = 0.0000001
Stream.from(1).exists(n => {
term = term / n
result = result + term
term < tolerance
});
println(result)
}
}