how i make c programming for print all prime numbers between 1 to 100 using contol units only?

Answer 1

You have to verify if the number in the loop is multiple of the all numbers in the other loop. Like this (in C++):

for (int i = 1; i <= 100; i++)
{
for (int j = 1; j < i; j++)
{
...
}
}

you'll change the ... for the operation.