=proto
int duk_get_top_index(duk_context *ctx);

=summary
<p>Get the absolute index (>= 0) of the topmost value on the stack.
If the stack is empty, returns <code>DUK_INVALID_INDEX</code>.</p>

=example
int idx_top;

idx_top = duk_get_top_index(ctx);
if (idx_top == DUK_INVALID_INDEX) {
    printf("stack is empty\n");
} else {
    printf("index of top element: %d\n", idx_top);
}

=tags
stack

=seealso
duk_require_top_index