Title: Death in office
Content:  Systems differ in how they deal with the death of an office holder. In some death results in a casual vacancy, whereby the office is unfilled for a time. The office may subsequently be filled by a by-election or by appointment. A person may temporarily take the powers and responsibilities of the deceased in an "acting" capacity before a permanent replacement is made. In other systems there may be a legally defined order of succession. For example, in hereditary monarchies reigns are typically expected to end with death and the transition of power to an heir. Many presidential systems have offices of vice president, whose principle responsibility is to immediately assume the presidency if the president dies or otherwise leaves the office.
Title: President of Iceland
Content:  Articles 7 and 8 of the constitution state that when the president dies or is otherwise unable to perform his duties, such as when he is abroad or sick, the prime minister, the president of the Parliament and the president of the Supreme Court shall collectively assume the power of the office until the president can resume their duties or a new president has been elected. Their meetings are led by the president of the Parliament where they vote on any presidential decisions. If the office of the president becomes vacant because of death or resignation, a new president shall be elected by the general public to a four year term ending on 1 August in the fourth year after the elections. Sveinn Björnsson remains the only president to die in office in 1952, triggering a presidential election one year ahead of schedule.
Title: Brazilian presidential line of succession
Content:  As stated above, the only constitutional successor of a president is his vice president. Only a vice president becomes president in the event of death, removal or resignation of the elected president. However, the vice president, in addition to being the president's only potential successor, is also his first substitute, serving as acting president when the president is abroad, or when the president is suspended pending an impeachment process, or when the president is otherwise incapacitated (e.g., for medical reasons). The line of presidential substitutes comprises, in addition to the vice president, the president of the Chamber of Deputies, the president of the Federal Senate, and the president of the Supreme Federal Court, in that order. Those officers are called, in that order, to discharge the powers and duties of the presidency, as acting president, when both the president and vice president are not within 
Title: Order of succession
Content: Example of succession ; If the President of the United States is unable to serve, the Vice President takes over if able to serve. If not, the order of succession is Speaker of the House, President pro tempore of the Senate, Secretary of State, and other cabinet officials as listed in the article United States presidential line of succession. ; In Finland, the president's temporary successor is the prime minister and then the ministers in the order of days spent in office, instead of in order of ministry. There is no vice president, and a new president has to be elected if the president dies or 
Title: List of presidents of the United States who died in office
Content:  Since the office was established in 1789, 45 persons have served as President of the United States. Of these, eight have died in office: four were assassinated, and four died of natural causes. In each of these instances, the vice president has succeeded to the presidency. This practice is presently governed by Section One of the Twenty-fifth Amendment to the United States Constitution, ratified in 1967, which declares that, "the Vice President shall become President" if the president is removed from office, dies, or resigns. The initial authorization for this practice was provided by Article II, Section 1, Clause 6 of the Constitution, which states that: "In Case of the Removal of the 
Title: President-elect of the United States
Content:  Scholars have noted that the national committees of the Democratic and Republican parties have adopted rules for selecting replacement candidates in the event of a nominee's death, either before or after the general election. If the apparent winner of the general election dies before the Electoral College votes in December the electors would likely be expected to endorse whatever new nominee their national party selects as a replacement. The rules of both major parties stipulate that if the apparent winner dies under such circumstances and his or her running mate is still able to assume the presidency, then the running mate is to become 
Title: United States presidential line of succession
Content:   The United States presidential line of succession is the order in which the vice president of the United States becomes president of the United States or assumes the presidential powers and duties, via the president's death, resignation, removal from office (via impeachment conviction) or incapacity. Officials of the United States federal government (other than the vice president) assume the powers and duties of the presidency, if the president and vice president both become incapacitated, die, resign, or are removed from office, simultaneously. The order of succession specifies that the office passes to the vice president; if the vice presidency is simultaneously vacant, or 
Title: Philippine presidential line of succession
Content: If the president dies, becomes permanently disabled, is removed from office, or resigns, the vice president becomes the president and serves the unexpired term ; If both the president and the vice president die, become permanently disabled, are removed from office, or resign, the president of the Senate or, in case of their inability, the speaker of the House of Representatives, will act as president until a president or vice president is elected and qualifies ; If the acting president dies, becomes permanently disabled, is removed from office, or resigns, Congress shall, by law, provide who shall serve as president. They shall serve until the president or the vice president shall have been elected and qualified, and be subject to the same restrictions of powers and disqualifications as the acting president 
Title: Brazilian presidential line of succession
Content:  Should a president die, resign or be removed from office, a vice-president succeeds as president. The other officers in the line of succession do not become president in those cases. Instead, the next available person in line merely becomes acting president, and the Constitution dictates that, whenever both the presidency and the vice-presidency become vacant, new elections are to be held. So in the case of an acting president taking office due to a double vacancy in the presidency and vice-presidency, the acting president serves only until the special election takes place and the newly elected president and vice-president are 
Title: President of Argentina
Content:  In the absence of both the president and the vice president, the succession is regulated by the Law 20,972 ("Acephaly Law"). It provides that the executive power must be temporarily exercised (without assuming the title of president) by the provisional president of the Senate; in his or her absence, by the president of the Chamber of Deputies; and in the absence of both, by the president of the Supreme Court. In case of the permanent absence of both the president and the vice president, due to resignation, death, or removal, the Constitution (art. 88) entitles the National Congress Assembled to select a new president from among the current senators, deputies and governors, within the following two days of the death or resignation of the former president, and to provide him or her with a mandate to call for elections.

Question: who comes after the president if he dies?
Answer: vice president.