Question

what is the output of the following program?
question: 23
var result = 0;
var max = 5;
for(var i = 0; i < max; i++){
result += i;
}
println(result);
15
10
0
12345

Explanation:

Step1: Analyze the loop

The loop runs from \(i = 0\) to \(i=4\) (since \(i < max\) and \(max = 5\)).

Step2: Calculate the sum

\(result=0 + 1+2 + 3+4\). Using the formula for the sum of an arithmetic series \(S_n=\frac{n(a_1 + a_n)}{2}\), where \(n = 4\) (number of terms from \(i = 1\) to \(i = 4\)), \(a_1=1\), \(a_n = 4\). \(S=\frac{4\times(1 + 4)}{2}=10\).

Answer:

10