The IUPAC name of the given compound is
Octane
Let us begin by numbering the carbon chain. The longest chain is 8 carbons long. The word root to be used is 'oct' and since there are only carbon-carbon single bonds the suffix 'ane' will be added. The IUPAC name of the compound will be given by word root + suffix. Therefore the IUPAC name of the given compound is octane.