Section 1.501(c)(4)-1 of the regulations states that an organization is operated exclusively for the promotion of social welfare if it is primarily engaged in promoting in some way the common good and general welfare of the people of the community.
In computer science, a local variable is a variable that is given local scope. Local variable references in the function or block in which it is declared override the same variable name in the larger scope. In programming languages with only two levels of visibility, local variables are contrasted with global variables.
Now let's see difference between instance variable and local variable. local variables are local in scope and they are not visible or accessible outside there scope which is determined by {} while instance variables are visible on all part of code based on there access modifier e.g. public, private or protected.