Editing Symbol table (section)

==Example==

Consider the following program written in [[C (programming language)|C]]:
<syntaxhighlight lang="C">
// Declare an external function
extern double bar(double x);

// Define a public function
double foo(int count)
{
    double sum = 0.0;

    // Sum all the values bar(1) to bar(count)
    for (int i = 1; i <= count; i++)
        sum += bar((double) i);
    return sum;
}
</syntaxhighlight>

A C compiler that parses this code will contain at least the following symbol table entries:
{| class="wikitable"
|- style="background:silver"
!style="width:8em" | Symbol name
!style="width:10em" | Type
!style="width:10em" | Scope
|-
| <code>bar</code> || function, double || extern
|-
| <code>x</code> || double || function parameter
|-
| <code>foo</code> || function, double || global
|-
| <code>count</code> || int || function parameter
|-
| <code>sum</code> || double || block local
|-
| <code>i</code> || int || for-loop statement
|-
|}

In addition, the symbol table may also contain entries generated by the compiler for intermediate expression values (e.g., the expression that casts the <code>i</code> loop variable into a <code>double</code>, and the return value of the call to function <code>bar()</code>), statement labels, and so forth.