It is convenient to think of current as flowing from positive to negative. This is called conventional current . Current arrows in circuit diagrams always point in the conventional direction. However, you should be aware that this is the direction of flow for a positively-charged particle. In a copper wire, the charge carriers are electrons.
Electrons are negatively-charged and therefore flow from negative to positive.
This means that electron flow is opposite in direction to conventional current. Current flow in electronic systems often involves charge carriers of both types. For example, in transistors, current can be carried by electrons and also by holes , which behave as positive charge carriers. When the behaviour of a circuit is analysed, what matters is the amount of charge which is being transferred. The effect of the current can be accurately predicted without knowing about whether the charge carriers are positively or negatively charged.