What is melodic minor. Explain briefly. What is Harmonic minor. Explain briefly

Harmonic Minor Scale - To play a harmonic minor scale, you simply raise the seventh note of the scale by a half-step as you go up and down the scale. For example:
Natural C Minor Scale = C - D - Eb - F - G - Ab - Bb - C
Harmonic C Minor Scale = C - D - Eb - F - G - Ab - B - C

Melodic Minor Scale - When you raise the sixth and seventh notes of a scale by a half step as you go up the scale and then return to the natural minor as you go down the scale. For example:
Melodic C Minor Scale = C - D - Eb - F - G - A - B - C (as you go up the scale)
Natural C Minor Scale = C - D - Eb - F - G - Ab - Bb - C (as you go down the scale)