Question

Составьте программу вычисления суммы натуральных чисел от 20 до 99 с использованием оператора for

Answer 1

#include <iostream>#include <stdio.h>#include <conio.h>
int main() { setlocale(LC_ALL, "");
int sum = 0;
for (int i = 20,step = 0; i <= 99; ++i,++step) { sum += i; }
printf("sum: %d", sum); _getch(); return 0;}
//код напсан на (си/си++)

Answer 2

Program to Calculate the Sum of Natural Numbers from 20 to 99 Using the 'for' Loop

To calculate the sum of natural numbers from 20 to 99 using the 'for' loop, you can follow these steps:

1. Initialize a variable to store the sum and set it to 0. 2. Use a 'for' loop to iterate through the numbers from 20 to 99. 3. In each iteration, add the current number to the sum variable. 4. After the loop finishes, the sum variable will contain the total sum of the natural numbers from 20 to 99.

Here's an example of how the program would look in Python:

# Initialize the sum variable
sum_of_numbers = 0

# Use a for loop to iterate through the numbers from 20 to 99
for num in range(20, 100):
    # Add the current number to the sum
    sum_of_numbers += num

# Print the sum
print("The sum of natural numbers from 20 to 99 is:", sum_of_numbers)

When you run this program, it will calculate the sum of natural numbers from 20 to 99 using the 'for' loop and display the result.

Note: The 'range' function in Python generates a sequence of numbers starting from the first parameter (20 in this case) and ending at the second parameter minus one (100-1=99 in this case). The '+= ' operator is used to add the current number to the sum variable in each iteration of the loop.

I hope this helps! Let me know if you have any further questions.