for loop help?

Question

ur supposed to take the inetger that the user inputs and use a for loop so it starts from 2 keeps adding until it get to the intege rinputed. for example if the user inputs 5, the program should print out 14. (2+3+4+5) how would u write that using for loop? thanks in advance.

Answer 1

you need to know what number was provided

then run your for loop setting the initial variable to 2 and stopping when it reaches the number provided:

for(int i=2;i<=n;i++)

Answer 2

The for /next loop will start at 2 and continue executing the code contained within the loop until its variable reaches and exceeds the number input by the user

userValue = input an integer above 2
test userValue if less than 2 generate a warning message and ask user again

create a totalizer variable and initialize it to 0
total =0

create your for next loop

for x = 2 to userValue
'within this loop totalize the value of x every time this loop is executed

total = total + x

next x

print your answer here

print total

end of rogram

Answer 3

You didn't specify a language, but here's one way in Perl:

-------------
print "Please enter loop counter:";
chomp ($count = );

for ($x=2; $x <= $count; $x++) {
$total += $x;
# debug
}

print "Total = $total\n";
--------

If you want to track the progress of the adder through the loops you can add the following line where the #debug tag is above:

print "running total = $total this pass";

Answer 4

You didn't specify a language so here is a C Example

int index;
int count = 0;

for ( index = 2; index <= numInputed; index ++ ) {
count += index;
}