If either of the two values is zero
if ( value_1 == 0 and value_2 != 0 ) : NEW_LINE INDENT print ( " Point ▁ 1 ▁ on ▁ the ▁ plane " ) NEW_LINE DEDENT if ( value_1 != 0 and value_2 == 0 ) : NEW_LINE INDENT print ( " Point ▁ 2 ▁ on ▁ the ▁ plane " ) NEW_LINE DEDENT