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解题.for; block scope; while; "2 to the " + i + " power is " + result
1 package com.java7; 2 3 public class WhileDemo { 4 public static void main(String[] args) { 5 int e; 6 int result; 7 for(int i = 0; i < 10; i++){ 8 result = 1; 9 e = i;10 while(e > 0){11 result *= 2;12 e--;13 }14 15 System.out.println("2 to the " + i + " power is " + result);16 }17 }18 }
执行过程：
1: i = 0; result = 1; e = 0;
2: i = 1; result = 1; e = 1; result = result(1)*2 = 2; e = 0; end loop;
3: i = 2; result = 1; e = 2; result = result(1)*2 = 2; e = 1; result = result(2)*2 = 4; e = 0; end loop;
4: // ...
解题.for; block scope; while; "2 to the " + i + " power is " + result
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