Checks if the number is a prime number. - Java java.lang

Java examples for java.lang:Math Prime Number

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Description

Checks if the number is a prime number.

Demo Code

/**/*ww  w.  j ava 2 s  .  c o  m*/
 * Copyright (C) 2007 Asterios Raptis
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;

public class Main {
    /**
     * Checks if the number is a prime number.
     * 
     * @param number
     *            The number.
     * @return Returns true if the number is a prime number otherwise false.
     */
    public static boolean isPrimeNumber(int number) {
        int a = 1;
        for (int count = 2, telos = (int) Math.sqrt(number); count <= telos
                && a != 0; count++)
            a = number % count;
        return a != 0;
    }
}

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