数系包括不同类型的数，例如质数、奇数、偶数、有理数、整数等。这些数可以相应地以数字和文字的形式表示。例如，40、65等以数字形式表示的数字，也可以写成40、65。
A Number system or numeral system is defined as elementary system to express numbers and figures. It is the unique way of representation of numbers in arithmetic and algebraic structure.
数字用于各种算术值，适用于执行各种算术运算，如加法、减法、乘法等，这些运算适用于日常生活中的计算目的。数字的值由数字、它在数字中的位置值以及数字系统的基数决定。
数字通常也称为数字，是用于计数、测量、标记和测量基本量的数学值。
Numbers are the mathematical values or figures used for the purpose measuring or calculating the quantities. It is represented by numerals as 2,4,7, etc. Some examples of numbers are integers, whole numbers, natural numbers, rational and irrational numbers, etc.
有不同类型的数字按数字系统分类。类型描述如下：
零组成的数字子集和所有正整数都是整数。整数从零计数到无穷大。这些数字用于日常计算，主要用于测量基本量。
整数是自然数的唯一组成部分，包括零。子集由 {0,1,2,3,4,5,…….} 给出，该集合不包括分数、小数和负整数。
整数示例
正整数也称为计数，包括零是整数的一部分，例如 0、1、2、3、4、5 等，不包括负整数、分数和小数。
10、11、22,100,1000 等都是整数的例子。
现在，让我们进入这个问题
回答：
Since, the whole numbers are set of real numbers that includes zero and all positive counting numbers, such as 0,1,2,3,4, etc. Whereas, excludes fractions, negative integers, fractions, and decimals.
As we know that 5 is a whole number but the square root of 5 i.e. √5 is 2.2360679 means its not a perfect square of 5 and √5 is irrational number, and having non terminating and non recurring decimal value, and whole numbers does not include decimals.
So square root of 5 is not a whole number
问题1：整数的例子有哪些？
回答：
The real numbers like 55, 60, 100, and 110 are the examples of whole numbers.
问题2：4的平方根是整数吗？
回答：
Yes, the square root of 4 is a whole number. Since, 4 is a perfect square 2 and after square root being simplified the result would be 2, which is a whole number.
问题3：0是整数吗？
回答：
Since, the whole numbers are set of real numbers that includes zero and all positive counting numbers, 0 is also a whole number.
问题 4：3.55 是整数吗？
回答：
The whole numbers are set of real numbers that includes zero and all positive counting numbers. Whereas, excludes fractions, negative integers, fractions,and decimals. Hence, 3.55 being a decimal value is not a whole number.
问题5：25的平方根是整数吗？
回答：
Yes, the square root of 25 is a whole number. Since, 25 is a perfect square of 5 and after square root being simplified the result would be 5, which is a whole number.
