Question

What is the value of the variable named s2 after the following statements are executed?

string s1 = "abcdefg";
string s2 = "";
for (int i = 0; i < s1.Length; i += 2) { s2 += s1[i]; }
a. abcdefg
b. aceg
c. bdf
d. the string is empty

Answer 1

After the code is executed, the variable s2 will hold the value "aceg" since the loop adds every character from s1 at an even index to s2.

Step-by-step explanation:

The value of the variable named s2 after the following statements are executed would be "aceg". This is because the loop iterates over the string s1, which is "abcdefg", and adds every character at an even index to s2. The first character of a string is at index 0, which is considered even, and the loop increments the index by 2 each time, so it will collect the characters at indexes 0 ('a'), 2 ('c'), 4 ('e'), and 6 ('g').

The given code initializes a string variable named s2 as an empty string.

The for loop iterates over each character in the string s1 and appends every second character to the s2 variable. So, the characters at indices 0, 2, 4, and 6 in s1 are 'a', 'c', 'e', and 'g', respectively, which results in aceg for s2.