Given a number N as input, output the sum of all numbers from 1 to that number

Question

n <- readLines('stdin')
n <- as.integer(n[1])
x <- c(1:N)
for(i in 1:N){
sum <- sum + i
}
print(sum(x))

Answer 1

n <- readLines('stdin')
n <- as.integer(n[1])
z <- c(1:n)
print(sum(z))

Answer 2

it says: object N not found

Answer 3

so now what's wrong with this one:

N <- readLines('stdin')
N <- as.integer(N[1])
x <- c(1:N)
for(i in 1:N){
print(n*(n+1)/2))

Answer 4

thanks Roberto Onoro

Answer 5

void main()
{
int n, i, s=0;
clrscr();
printf(”Enter number :”);
scanf(”%d”, &n);
for(i=1;i<=n;i++)
s+=i;
print(”The sum of 1 to %d is %d”, n, a);
getch();
}