Question

сколько раз выполнится оператор while в следующем фрагменте программы: s:=0; k:=1; while s<=7 do begin k:=k+1; s:=s+k end

Answer 1

3 раза.
После первого прохождения цикла 
s=2; k=2;
после 2  прохождения цикла 
s=5; k=3;
после 3  прохождения цикла 
s=9; k=4; 
при следующей проверки условие s<=7 не выполниться так как s>7

Answer 2

Calculating the Number of Times the While Loop Executes

To determine how many times the `while` loop will execute in the given program, we need to analyze the code provided:

s:=0;
k:=1;
while s<=7 do
begin
  k:=k+1;
  s:=s+k
end

The `while` loop will execute as long as the condition `s<=7` is true. The loop increments the value of `k` by 1 and adds it to the value of `s` in each iteration.

Analysis and Calculation

Let's analyze the code step by step to determine how many times the `while` loop will execute:

1. Initial values: - `s` is initialized to 0. - `k` is initialized to 1.

2. First iteration: - `k` becomes 2 (1+1). - `s` becomes 2 (0+2).

3. Second iteration: - `k` becomes 3 (2+1). - `s` becomes 5 (2+3).

4. Third iteration: - `k` becomes 4 (3+1). - `s` becomes 9 (5+4).

The loop stops executing after the third iteration because the condition `s<=7` is no longer true (9 is not less than or equal to 7).

Conclusion

The `while` loop will execute 3 times based on the given program and the condition specified.

This conclusion is based on the analysis of the provided code and the resulting values of `s` and `k` after each iteration.