Alkane is a saturated hydrocarbon. It is formed when there is sharing of one electron pair between carbon atom in a compounds
For example: $$ C_{2}H_{6}$$ Ethane $$ C_{3}H_{8}$$ propane
$$ C_{4}H_{10}$$ butane
$$ C_{5}H_{12}$$ pentane $$ C_{6}H_{14}$$ hexane
$$ C_{7}H_{16}$$ heptane
$$ C_{8}H_{18}$$ octane $$ C_{9}H_{20}$$ nonane
$$ C_{10}H_{22}$$ decane
$$ C_{11}H_{24}$$ undecane