Islam (; , ) is an Abrahamic  monotheistic religion. All of its teachings and beliefs are written out in the Quran (also spelled Qur'an or Koran), the holy scripture of Islam. Believers of Islam are called Muslims. Islam means submission to the will of God. They believe that the Quran was spoken to Muhammad ﷺ by the angel Gabriel. The Quran is regarded as the word of God (or Allah). The muslims view Muhammad ﷺ as a prophet and messenger of God. Other beliefs and rules about what Muslims should do come from reports of what Muhammad ﷺ taught (Hadith).

Linguistically, Islam is defined as surrender to the command of God without objection, without submission, rebellion, and stubbornness. As for its idiomatic meaning, it is the religion that was brought by “Muhammad ﷺ bin Abdullah,” sent by Almighty God, and which Muslims believe is the law with which God sealed the heavenly messages. In a hadith on the authority of Abu Hurairah that the Prophet Muhammad ﷺ defined Islam: “By worshiping God and not associating anything with Him, performing the prayer, paying the obligatory zakat, fasting Ramadan and performing the pilgrimage to the house of God.”  

Muslims believe that there were many other prophets before Muhammad ﷺ since dawn of humanity, beginning with the Prophet Adam and including the Prophet Noah (Nuh), the Prophet Abraham (Ibrahim), the Prophet Moses (Musa), and the Prophet Jesus (Isa). They believe that all these prophets were given messages by God of the oneness of God to their communities at different times in history of mankind, but Satan (referred to as 'Shaytan' in Arabic) made the past communities deviate from the message of oneness and other social codes. Muslims believe that the content of the Quran (written in Arabic) is protected by Allah as mentioned in the Quran and is the final message of God for all of mankind until the day of judgment.

Most Muslims belong to one of two groups.  The most common is Sunni Islam (75–90% of all Muslims are Sunni Muslims). The second is Shia Islam (10–20% of all Muslims are Shias – also called Shiites). But there are many more groups like the Alevis in Turkey.

With about 1.75 billion followers (24% of the world's population), Islam is the second-largest religion in the world. Islam is also the fastest-growing religion in the world. Islam is also the second-largest and fastest-growing religion in Europe.

History 

Muslims believe the Qur'an was first revealed to Muhammad ﷺ by the archangel Gabriel in a cave on the mountain of Hira in Mecca, and then over a period of twenty-three years until his death. 

Scientific researches;

Beliefs and practices 

According to the Qur’an, Muslims believe in God, his angels, his books, his messengers, the Last Day, and Fate. In accordance with a Qur’anic verse: “We have created everything with predestination As much is good and bad". And in hadith the Messenger Muhammad ﷺ when he said that faith is: “to believe in God, his angels, his books, his messengers, and the Last Day, and believe in the destiny of good and bad.” Muslims believe that God is the one God who created the universe with everything in it. The Qur’an revealed to the Prophet Muhammad ﷺ through Gabriel. They believe that he is the final messenger of all messengers that are sent before him. The Prophets are human beings and children of Adam, whom God chose to be his messengers. Muslims believe that the prophets are not gods, but merely human beings with some miracles to prove their prophethood. They are the ones who receive divine revelation.

The Quran mentions the names of many prophets, including Adam, Noah, Abraham, Moses, Jesus, and others. According to the Qur’an, all of the prophets were Muslims who preached Islam, but with different laws. Islam is defined in the Qur’an as “the instinct of God upon which people have broken in.” "Therefore set your face to the religion purely, the upright creation upon which He originated people. There is no change in the creation of Allah. This is the valuable religion, although most people do not know} (The Romans -Ar-Rum Surah, versus 30) Muslims also believe that Hanifism is the basis of Abraham's religion. And they see that the difference between the Abrahamic religions is in the Sharia (Law) only and not in the creed and that the Sharia of Islam abrogates what preceded it from the Sharia. this means that Islamic religion consists of Belief and Sharia.

As for belief, it is the set of principles that a Muslim must believe in, and it is fixed and does not differ according to the different prophets. As for Sharia (Law), it is the name for practical rulings that differ according to the different messengers.

The Five Pillars of Islam 

According to Islamic tradition, there are five basic things that Muslims should do. They are called "The Five Pillars of Islam":
Shahadah: The Testimony (faith in English) is the core of the Muslim belief that there is no god but Allah himself, and that Muhammad ﷺ is his last messenger.
 Salaat (Also spelled as Salaah, if in the end of sentence): Muslims pray five times per day, at special times of the day.  When they pray, they face Kaaba, a large cubic structure located at the holy city of Mecca. Salat is namaz in Persian, Turkish and Urdu. Shia Muslims can pray the afternoon and evening prayers right after each other. 
 Zakat: Muslims who have money must give a percentage of the money which it's still with them for a year 1/40th of their money (charity in English) to help people who do not have money or need help.
 Sawm (Also spelled as Siyam or Sum):  Fasting during Ramadan, the ninth month of the Islamic year.  Muslims do not eat or drink from Fajr till sunset for one lunar month. After Ramadan, there is a holiday called Eid al-Fitr (which means "festival of end-fast" in English). On Eid al-Fitr, Muslims usually go to the mosque in the morning after sunrise for a special Salaah.
 Hajj (Pilgrimage in English): During the month of Zulhejja, the 12th month of the Islamic Calendar is the pilgrimage season where many Muslims go to Mecca, the holiest city of Islam. However, if a Muslim is financially unable to perform the Hajj, it is not necessary for them to do so. Those who possess great financial capacity were the most obligated to perform the Hajj.

Note: The Five Pillars of Islam is a term in the view of Sunni Islam that gathered out of the hadith. There is another term Osul al-Din (Religion Principles in English) in Shia Islam. That contains five beliefs : Tawheed, Adl, Nabovah, Imamah, Maad.

Quran 
In Islamic belief, the Quran is the holy book of Islam and contained to words of Allah (God) and is conveyed to the Prophet Muhammad ﷺ by the archangel Jibraeel (Gabriel), who had been tasked since Adam as the conveyor of the words of God as guidance to mankind. The Quran is the central point of reference and is a link which connects humanity with God.

The Qur'an contains many passages and chapters which covers the entire aspect of humanity, down to the most minute detail. From the creation and conception of human child to the details of the Earth and beyond. In the aspect of human life it contains stories and tales of old civilizations and past prophets and their life chronicles. The Quran also contains the Syaria' law or hudud, and emphasizes the equal rights man and women alike with mothers given special status where it is sinful to even glare at them.

The Qur'an has a total of 30 Juzuks. In each Juz, there are many Surahatun or verses, with 114 Surahatun which begins with Surah al-Fatehah (The Beginning) and ended with Surah an-Naas(Humanity). A Hafeez is a Muslim who has committed the Quran to memory and can accurately say every word in the Quran without flipping a single page and apply them to daily life.

Other important teachings in Islam are the Sunnah (which tell about Muhammad ﷺ's life) and the Hadith (which are collections of dialogues of conversation that Muslims believe Muhammad ﷺ said).

The Qur'an is considered in Islam as a manual to all of humanity and its teachings are to be implemented and shared by its readers.

Place of worship / Quran readings

Muslims pray in a place of worship called the mosque. A mosque is called a masjid in Arabic. Most mosques were mostly seen having at least a single dome, and some have one or more towers called Minarat, where the Muadzin gives the Adhan. The Call for Muslim Prayer.  Which is 13 or 15 sentences. But many mosques were built without either domes or towers.

Muslims take their shoes off before entering the masjid to pray.  Prayer is one of the most important things that a Muslim does.

Prayer 

The Muslim is called to prayer or solah five times a day. This call to prayer is called Adhan. The muezzin, a man chosen to make the call to prayer, uses a loudspeaker, which carries his voice to the people nearby.  The call to prayer is often done out loud, in public, in Muslim countries.  Being called to solah is a normal part of daily life for most people in Muslim countries.

Muslims pray on a mat, which is called a prayer mat or prayer rug in English.  Common Arabic names for the prayer mat include sajjāda and namazlık.

When it is time to pray, Muslims face the direction of Qibla - the direction they are supposed to pray in, towards Mecca.  They then roll out their prayer mat, and perform their prayers to God.

Peace be upon him
According to Islamic teachings, Muslims must say "صَلَّى اللّٰهُ عَلَيْهِ وَسَلَّمَ" shortened as "ﷺ" whenever they hear or say the Prophet's ﷺ name or it ﷺ being a common noun.

Islam in the world

In 2009, a study was done in 232 countries and territories. This study found that 23% of the global population or 1.57 billion people are Muslims. Of those, between 75% and 90% are Sunni and between ten and twenty five percent are Shi'a.  A small part belong to other Islamic sects. In about fifty countries, more than half of the people are Muslim.  Arabs account for around twenty  percent of all Muslims worldwide. Islam has three holy sites; Jerusalem, Mecca and Medina.

Most Muslims live in Asia and Africa. Around 62% of the world's Muslims live in Asia, with over 683 million followers in Indonesia, Pakistan, India, and Bangladesh. In the Middle East, non-Arab countries such as Turkey and Iran are the largest Muslim-majority countries; in Africa, Egypt and Nigeria have the biggest Muslim communities.

Most estimates indicate that the People's Republic of China has about 20 to 30 million Muslims (1.5% to 2% of the population). However, data provided by the San Diego State University's International Population Center to U.S. News & World Report suggests that China has 65.3 million Muslims. Islam is the second largest religion after Christianity in many European countries,
and is slowly catching up to that status in the Americas.

Different denominations 
Like with other religions, over time different movements have developed in Islam. These movements are based on different interpretations of the scriptures. The following sections list the most common movements.
 Non-denominational Muslims are Muslims who don't follow any branch and simply call themselves Muslim. They are also called Ghayr Muqallids.
 The Muwahidin or Muwahid Muslims are a Muslim restoration movement that accepts mainstream Islam, but prefer to orient themselves towards a primacy of God's commands on issues pertaining to sharia law. Muwahidists believe that modern Islam has been mixed with many cultural traditions and they want to change that.
 The Shi'ites believe that just as only God can appoint a prophet, he can appoint a second leader after the prophet. Shi'a Muslims believe that God chose Ali as the leader after Muhammad ﷺ. About 10-20% of Muslims are Shi'a which means that there are about 120 million world wide. Shi'a Muslims form the majority of Muslims in Iran, Azerbaijan, Bahrain, Iraq, and Lebanon. The largest adhab in Yemen is Zaydi Shia. Shias commonly gather for Day of Ashura in Karbala. They accept four hadiths. 
 Sunnism considers Abu Bakr to be the successor of Muhammad ﷺ.  Sunnis make up roughly 75% of Muslims. Sunnis believe that leaders of Islam should be chosen by the people of the Muslim world. After Abu Bakr died, Omar took his place, then Uthman, and then Ali. All of them were companions of Muhammad ﷺ and lived in Medina. Sunni beliefs are typically based on the Qur'an and the Kutub al-Sittah (six hadiths). Sunnis are sometimes called Bukharists.

 The Sufi are a branch  Sunnism that focuses more on the spiritual and mystic elements of Islam. Sufis usually conclude their prayers with dhikr recitations.
 The Quraniyoon generally reject the authority of the hadiths. Such Muslims, also known as Quranists and Ahle Quran, believe that the Quran is the only source of guidance.  They say the hadiths are not endorsed by the Quran, and some call them an innovative bid'ah.
 Ibadis are Muslims who originated from the Kharijites. Ibadis today have reformed beliefs from original Kharijites.
 The Nation of Islam is a denomination in Islam primarily geared towards African Americans.
 The Five-Percent Nation, a denomination predominantly consisting of African Americans, also known as Nation of Gods  and Earths.

Related pages 
 Nation of Islam
 Sunni Islam
 Shia Islam
 Quranism
 Halal

References

General references
 
 
 
 
 
 
 
Notes

Other websites

Academic resources
 Patheos Library – Islam
 University of Southern California Compendium of Muslim Texts
 Divisions in Islam

Online resources
 Islam, article at Encyclopædia Britannica

Directories
Islam (Bookshelf)  at Project Gutenberg
Islam from AsiaAuthorities Asia  UCB Libraries GovPubs

Dua

 Dua E Qunoot
 Dua E Nisf

 
Arabic words and phrases