Nigeria relatively little violence or voter fraud, in contrast to previous elections. In the March 2015 election, Muhammadu Buhari defeated Goodluck Jonathan by roughly 2 million votes. Observers generally praised the election as being fair. Jonathan was generally praised for conceding defeat and limiting the risk of unrest. Nigeria is a federal republic modelled after the United States, with executive power exercised by the President. It is influenced by the Westminster System model in the composition and management of the upper and lower houses of the bicameral legislature. The president presides as both head of state and head of the federal
S-expression vary in the different languages, but the most common feature among these languages is the use of S-expressions and prefix notation. There are many variants of the S-expression format, supporting a variety of different syntaxes for different datatypes. The most widely supported are: The character codice_15 is often used to prefix extensions to the syntax, e.g. codice_16 for hexadecimal integers, or codice_17 for characters. When representing source code in Lisp, the first element of an S-expression is commonly an operator or function name and any remaining elements are treated as arguments. This is called "prefix notation" or "Polish notation". As