各位大佬看下哪错了
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if(num>=0&&num<=999999999){
whlie(num!=0){
count++;
num/=10;
}
System.out.prinltn("它是个"+count"位的数");
}else{
System.out.ptintln("输入有误!");
}
}
}
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