Simple statements

Assignment statements

...n = 3;

....A[i][j] = A[i-1][j] + A[i][j-1];

Procedure calls

...invert_matrix(A, n);

....initialize();

Statement block

....{
........first_thing();
........second_thing();
........third_thing();
.... }

Statements end with a semicolon.

Blocks delimited by { and }, like Pascal's begin and end.
No semicolon after }.