Network Security Tools

for

A for loop expects three statements separated by semicolons as arguments. The first statement is executed first, and only once. It is most frequently used to assign a value to a variable, which is usually used by the loop to perform iteration. The second statement is a condition that should return true for the loop to continue looping. The third statement is invoked by the for loop after every iteration, and is used to increment or decrement the iteration variable. For example, the following for loop prints all the values of the array myports:

for(i=0; i < max_index(myports); i++)
{
    display(myports[i],"\n");
}

The function max_index() returns the number of elements in an array, and we use it in our for loop to ensure that the value of i is within range.