/* --------------------------------------------------- for文 1からnまでの合計 For_04_goukei --------------------------------------------------- */ import java.io.*; import java.text.*; class For_04_goukei { public static void main(String[] args) throws Exception { int i,goukei; int end; goukei=0; BufferedReader inp=new BufferedReader (new InputStreamReader(System.in)); String keybd; System.out.print("いくつまでの合計を求めますか\n"); System.out.print("END -->"); keybd=inp.readLine(); end=Integer.parseInt(keybd); System.out.print("\n"); for ( i=1 ; i<=end ; i=i+1 ) { System.out.print(i); if ( i != end ) System.out.print("+"); goukei=goukei+i; } System.out.print("="+goukei); System.out.print("\n"); } }