Is there any difference between using multiple if statements and else if statements?

Question

This question pertains specifically to shell scripts, but could be about any programming language.

Is there any difference between using multiple if stateme

Answer 1

if (x == 0) {
    // 1
}


if (x >= 0) {
    // 2
}

if (x <= 0) {
    // 3
}

Above code will produce different value than the code below for x=0.

if (x == 0) {
    // 1
} else if (x >= 0) {
    // 2
} else {
   // 3
}

In the first case all the statements 1, 2, and 3 will be executed for x = 0. In the second case only statements 1 will be.