President of Nigeria became the newly elected civilian president. Obasanjo served two terms in office. In May 2007, Alhaji Umaru Yar'Adua was sworn in as President of the Federal Republic of Nigeria, the 13th head of state of Nigeria. Yar'Adua died on 5 May 2010 in the Presidential villa, in Abuja, Nigeria. On 6 May 2010, the Vice President Goodluck Jonathan was sworn in as President of the Federal Republic of Nigeria and the 14th head of state. On 29 May 2015, Muhammadu Buhari was sworn in as President of the Federal Republic of Nigeria and the 15th head of state after winning
S-expression an example, the Boolean expression written codice_18 in C, is represented as codice_19 in Lisp's s-expr-based prefix notation. As noted above, the precise definition of "atom" varies across LISP-like languages. A quoted string can typically contain anything but a quote, while an unquoted identifier atom can typically contain anything but quote, whitespace characters, parenthesis, brackets, braces, backslash, and semicolon. In either case, a prohibited character can typically be included by escaping it with a preceding backslash. Unicode support varies. The recursive case of the s-expr definition is traditionally implemented using cons cells. S-expressions were originally intended only for data to