public class Pi
{
public static void main(String[] args)
{
int t=0;
double result=0;
while(true)
{
t++;
double value=4.0/(2*t-1);
if(t%2==1) result+=value;
else result-=value;
System.out.println(result);
if(result>3.1415926&&result<3.1415927) break;
}
System.out.println(t);
System.out.println(result);
}
}
{
public static void main(String[] args)
{
int t=0;
double result=0;
while(true)
{
t++;
double value=4.0/(2*t-1);
if(t%2==1) result+=value;
else result-=value;
System.out.println(result);
if(result>3.1415926&&result<3.1415927) break;
}
System.out.println(t);
System.out.println(result);
}
}
public class Pi {
public static void main(String[] args) {
int t = 0;
double result = 0;
while (true) {
t++;
double value = 4.0 / (2 * t - 1);
if (t % 2 == 1)
result += value;
else
result -= value;
//System.out.println(result) 把这句去掉
if (result > 3.1415926 && result < 3.1415927)
break;
}
System.out.println(t);
System.out.println(result);
}
}
public static void main(String[] args) {
int t = 0;
double result = 0;
while (true) {
t++;
double value = 4.0 / (2 * t - 1);
if (t % 2 == 1)
result += value;
else
result -= value;
//System.out.println(result);去掉
if (result > 3.1415926 && result < 3.1415927)
break;
}
System.out.println(t);
System.out.println(result);
}
}
如果你想打算在循环中打印result,那么可以这样写
public class Pi {
public static void main(String[] args)
{
int t=0;
double result=0;
while(true)
{
t++;
double value=4.0/(2*t-1);
if(t%2==1) result+=value;
else result -= value;
if(result>3.1415926&&result <3.1415927)
{
System.out.println(result);
break;
}
}
System.out.println(t);
System.out.println(result);
} }