can i get some information about vectors in detail?

vectors are the quantities having magnitude and as well as direction. The magnitude is a scalar quantity, a scalar being defined as a quantity which may be completely specified by a number and perhaps a unit. Common textbook representations of vectors include boldfaced letters and boldface with an arrow above them. For example a displacement vector of 30 meters east could be represented in a variety of ways:

The magnitude of the vector might be represented by absolute value signs around the vector symbol, or just the letter without the boldface.