C_nH_2n+2 is the general formula for an alkane.

As we know that carbon has a valency of four, so it needs 4 other atoms to complete its octet. For that purpose it forms four bonds. When hydrocarbons, in which carbon atoms are linked to each other with single bonds, are known as alkanes. These alkane compounds follow a general rule for their formation, which is C_nH_2n+2. So the given statement is true.