''' Purpose: another take on nested loops
'''

rows = 4
cols = 3

for r in range( 0, rows ) :
    print( r )

print()
print()

for r in range( 0, rows ) :
    print( r )
    for c in range( 0, cols ) :
        print( "    ", r, c )

print()
print()

for r in range( 0, rows ) :
    print( r )
    for c in range( 0, cols ) :
        sum = r + c
        print( "    ", r, c, sum )

print()
print()

for r in range( 0, rows ) :
    for c in range( 0, cols ) :
        sum = r + c
        print( sum, end=" " )
    print()

print()
print()