While: <span> the loop must repeat until a certain "condition" is met. If the "condition" is FALSE at the beginning of the loop, the loop is never executed. The "condition" may be determined by the user at the keyboard. The "condition" may be a numeric or an alphanumeric entry. <span>This is a good, solid looping process with applications to numerous situations.

</span></span><span>while:<span>int ctr = 1;

while (ctr < = 20)

{

cout<< ctr++ <<"\n";

}

</span><span>

</span><span>

</span><span>HOPE i HELPED! brainliest? :D </span></span>

Its perhaps B2

HOPE THIS HELPS

**Answer:**

First start the comupter next login then open File Explorer and finally use

**Explanation:**

**Answer:**

Code below

**Explanation:**

n = int(input('Please enter n: '))#take input n

print('please enter the numbers')#print enter the numbers

total = 0 #intially take total as 0

original_total = 1 #intially take original_total=1

for i in range(2, n+1): #take the range 2 to n+1

total += int(input('Please enter a number: ')) # add total and enter the number

original_total += i

missing = original_total - total #you got missing number original_total - total

print('The missing number is: ' + str(missing)) # print missing number in the given data