What is a for command? can u use a variable instead of a number in the for command!

A for loop is a block of code where a certain instruction repeats a certain amount of times.

Yes, you can use a variable instead of a number in a for loop.

Explanation:

For example, you're using a for loop and you want to repeat it a certain amount of times, but you want to take user input. You would ask the user for their input and assign it to a variable, then use that variable for the for loop.

answer; the above statement is (true);

which functions return a valid value without any arguments?

(-blank- and -blank- return a valid value without any arguments.)

1st -blank-

today

sqrt

count

2nd -blank-

round

now

sqrt