Non-Perfect Square Example:In the second example, 20 is not a perfect square because 20≈4.47\sqrt{20} \approx 4.4720≈4.47, which is not an integer. Conclusion This Java program is a simple way to determine whether a number is a perfect square or not. By using the Math.sqrt() m...
本次解题使用的开发工具是eclipse,jdk使用的版本是1.8,环境是win7 64位系统,使用Java语言编写和测试。 02 第一种解法 暴力解法,定义一个long类型的变量,for循环判断其平方是否小于num,但是不要写循环体,这样省时,最后直接判断其平方是否等于num。 public boolean isPerfectSquare(intnum) {if(num<=1) {returnnum...
解法一: 1publicclassSolution {2publicbooleanisPerfectSquare(intnum) {3if(num < 0)returnfalse;4if(num == 1)returntrue;5for(inti = 1; i<= num/i;i++){6if(i*i == num)returntrue;7}8returnfalse;9}10} 解法2: 二分查找法 (java 没有ac 仅供参考) 1publicclassSolution {2publicboolean...
Write a Java program to find the next perfect square that is greater than a specified number. Write a Java program to count the number of perfect squares within a specified numerical range. Write a Java program to determine if a number is a perfect square without using built-in square root...
367. Valid Perfect Square(完全平方数的判断) problem: Given a positive integer num, write a function which returns True if num is a perfect square else False. Note: Do not use any built-in library function such as sqrt. Example 1: Input: 16 Outp......
Learn how to check if a given number is a perfect number in Java with this simple guide and example code.
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Perfect Square: A perfect square is defined as a number which can be expressed as the product of two same integer values. For example: 16 is a perfect square number since it can be written as {eq}4 \times 4 {/eq}. An even integer can be expressed in the form...
This program iterating through each number one by one in the list, and check whether a given number is a perfect number or not. If a perfect number is found then print it else skip it. Here, thecheckPerfectNum()function is used to find its all positive divisors excluding that number ...
Perfect square number 有一个特性,比如0,1,4,9,16,25 他们之间的间隔分别是1,3,5,7,9,每次间隔都是i+2. 所以每次往下减i, i 更新成i+2. 看最后结果是否为0即可。 import java.util.*; public class isPerfectSquare{ public static void main(String [] args){ ...