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Which type of carbon-carbon bond occurs in an alkane?

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structures of common hydrocarbon compounds — hydrocarbon Structures assumed by hydrogen (H) and carbon (C) molecules in four common hydrocarbon compounds.

Alkanes are characterized by the presence of only single bonds between their atoms. Specifically, the carbon-carbon bonds in an alkane are single sigma (σ) bonds.123

In these structures, each carbon atom is $s p^{3}$ hybridized, forming a tetrahedral complex where the shared electron pair in each bond occupies the space directly between the two atoms. These single, nonpolar covalent bonds are strong and typically represent the least reactive portion of an organic molecule.23