jcsum.java

针对越来越多的用户喜欢JAVA

public class JcSum
{
  public static void main(String [] args)
  {
    float sum= 0, s= 1;
    int n;
    for(n= 1; n<= 20; n++)
    {
      s = s * n;
      sum = sum+ s;
    }
    System.out.println("l+2!+3!+4!+5!+…+20! ="+sum);
  }
}