ruby打印

Ruby中数字的幂 (Power of a number in Ruby)

The task to develop a program that prints power of a number in Ruby programming language.

开发可以用Ruby编程语言打印数字幂的程序的任务。

If we want to calculate the power of a number manually then we have to multiply the base to itself by exponent times which means that if the base is 3 and the exponent is 4, then power will be calculated as

如果要手动计算数字的幂，则必须将底数乘以自身乘以指数时间，这意味着如果底数为3且指数为4 ，则幂将计算为

power = 3*3*3*3, which will result in 81.

power = 3 * 3 * 3 * 3 ，结果为81。

Let us put the above logic into codes. We have used two methods to calculate power, one is by using user-defined function “pow” and one is with the help of ** operator. If you want to write code from scratch then the first method is appropriate for you.

让我们将以上逻辑放入代码中。 我们使用了两种方法来计算功率，一种方法是使用用户定义的函数“ pow”，另一种方法是借助**运算符。 如果您想从头开始编写代码，则第一种方法适合您。

Methods used:

使用的方法：

• puts: This is used to create an interaction with the user by putting some message on the console.

  puts ：用于通过在控制台上放置一些消息来与用户进行交互。

• gets: This is used to take input from the user in the form of string.

  gets ：用于接收用户以字符串形式的输入。

• to_i: This method is used to convert any type into an integer type.

  to_i ：此方法用于将任何类型转换为整数类型。

• pow: This is a user-defined function which takes two arguments and returns an integer value. It is defined purposefully for calculating power by taking base and exponent as an argument.

  pow ：这是一个用户定义的函数，它带有两个参数并返回一个整数值。 它的定义是有目的的，以底数和指数为参数来计算功效。

Ruby代码来计算数字的幂 (Ruby code to calculate power of a number)

=begin
Ruby program to calculate power of a number.
=end
def pow(a,b)
power=1
for i in 1..b
power=power*a
end
return power
end
puts "Enter Base:-"
base=gets.chomp.to_i
puts "Enter exponent:-"
expo=gets.chomp.to_i
puts "The power is #{pow(base,expo)}"

Output

输出量

RUN 1:
Enter Base:-
3
Enter exponent:-
5
The power is 243
RUN 2:
Enter Base:-
2
Enter exponent:-
3
The power is 8

Method 2:

方法2：

=begin
Ruby program to calculate power of a number
using ** operator.
=end
puts "Enter Base:-"
base=gets.chomp.to_i
puts "Enter exponent:-"
expo=gets.chomp.to_i
power=base**expo
puts "The power is #{power}"

Output

输出量

RUN 1:
Enter Base:-
5
Enter exponent:-
5
The power is 3125
RUN 2:
Enter Base:-
9
Enter exponent:-
2
The power is 81

翻译自: https://www.includehelp.com/ruby/print-power-of-a-number.aspx

ruby打印