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[英]If I don't know if a variable is positive/negative, how do I make it positive without calling a function or using if?
[英]How do I make these values both positive and negative?
如何使該程序打印出負值和正值,以便從100到100的隨機數?
public class RandomInts {
/*
* This program makes 10 random integers and prints them out on the console window.
*/
public static void main(String[] args) {
int[] myArray;
myArray = new int[10];
for( int i = 0; i < myArray.length; i++ ){
myArray[i] = (int)(Math.random() * 100);
} // End of first for loop.
for(int i=0;i<10;i++){
System.out.println("My array is " + myArray[i]);
} // End of second for loop.
} // End of the main.
} // End of the class RandomInts.
你可以嘗試-
公共類RandomInts {
/*
* This program makes 10 random integers and prints them out on the console window.
*/
public static void main(String[] args) {
int[] myArray;
myArray = new int[10];
for( int i = 0; i < myArray.length; i++ ){
myArray[i] = (int)(Math.random() * 200) - 100;
} // End of first for loop.
for(int i=0;i<10;i++){
System.out.println("My array is " + myArray[i]);
} // End of second for loop.
} // End of the main.
} //類的結尾RandomInts。
怎么樣myArray[i] = r.nextInt() % 101
,其中Random r = new Random()
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