java获取偶数或奇数

Question

我有一个学校作业：我需要得到偶数或奇数，我做了一些工作来处理零以上的数，但我需要找出负数是偶数还是奇数

String[] evenodd = {" number is even", " number is odd"};
for(int i = 0; i < 100; i++)
{
    int x = i;
    while (x > 1) x = x - 2;
    System.out.println(i + evenodd[x]);
}

Answer 1

尝试使用%运算符

用法：x % y->；当y除以x时，这将得到余数。 在您的情况下，使用y=2。因此，如果余数=0，则该数字为偶数，否则该数字为奇数

我不会给你确切的密码，因为这是你的任务。根据建议自己尝试一下

Answer 2

偶数和奇数数字：

String[] evenodd = {" number is even", " number is odd"};
for(int i = 0; i < 100; i++)
{
    System.out.println(i + evenodd[i % 2]);
}

或

String[] evenodd = {" number is even", " number is odd"};
for(int i = 0; i < 100; i++)
{
    if(i % 2 == 0)
         System.out.println(i + evenodd[i % 2]);
    else
         System.out.println(i + evenodd[i % 2]);
}

对于负数是偶数还是奇数

String[] evenodd = {" number is even", " number is odd"};
for(int i = 0; i > -100; i--)
{
    if(i % 2 == 0)
         System.out.println(i + evenodd[0]);
    else
         System.out.println(i + evenodd[1]);
}

Answer 3

找出奇数和偶数。遵循逻辑

• divide your number by 2 if the reminder is 0 then it is even

• else it is odd

• this similar for both positive and negative numbers

要查找提醒，请使用模除运算符（%）。如果您的\u编号%2=0，则您的\u编号为偶数，否则您的\u编号为奇数

示例代码：

for(int i=1;i<100;i++){
    if(i%2==0){//for positive number
        System.out.println(i+ " is Even Number");
    }else{
        System.out.println(i+ " is Odd Number");
    }
    if((-1)*i%2==0){//for negative number
        System.out.println((-1)*i+" is Even Number");
    }else{
        System.out.println((-1)*i+" is Odd Number");
    }
}

Answer 4

只需使用模块%运算符

String[] evenodd = {" number is even", " number is odd"};
for(int i = 0; i < 100; i++)
{
int x;

if(i%2==0){
 x=0;/*pass 0 to print even number */
}else{
 x=1;/*pass 1 to print odd number*/
}
System.out.println(i + evenodd[x]);
}