The index finger, also called the index finger, refers to the finger immediately next to the thumb, and both the left and right hand have one index finger each. Normal people have five fingers on each of their left and right hands, and the thickest, shortest, fattest finger, which is not lined up with the other four fingers, is called the thumb. The finger next to the thumb is called the index finger, because when there are no chopsticks, this finger is used to dig and eat, fish and eat or taste food, so it is called the index finger. The fingers next to the index finger are called the middle finger, ring finger and little finger, in that order. The index finger, especially the index finger of the right hand, is the most important, most commonly used and most flexible in working life, and the index finger is used in priority when dialing phone numbers and giving directions to others. The index finger is often used in conjunction with the thumb and middle finger to perform many fine movements such as eating, writing, fastening buttons, sewing clothes with a needle, and so on.