c lang has 32 keywords.

auto

The auto keyword declares automatic variables

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break

The break statement terminates the innermost loop immediately when it's encountered. It's also used to terminate the switch statement.

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case

It is used when a blocks of code are to be executed in 'switch' depending on the case

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char

The char keyword declares a character variable

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const

An identifier can be declared constant by using the const keyword

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continue

The continue statement skips the statements after it inside the loop for the iteration

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default

The default statement is executed if no case constant-expression value is equal to the value of expression . If there's no default statement, and no case match is found, none of the statements in the switch body get executed. There can be at most one default statement

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do

The do-while statement lets you repeat a statement or compound statement until a specified expression becomes false.

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double

Keywords double and float are used for declaring floating type variables

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else

In C programming, if and else are used to make decisions.

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enum

Enumeration types are declared in C programming using keyword enum

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extern

The extern keyword declares that a variable or a function has external linkage outside of the file it is declared

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float

Keywords double and float are used for declaring floating type variables.

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for

The for statement lets you repeat a statement or compound statement a specified number of times. The body of a for statement is executed zero or more times until an optional condition becomes false

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goto

The goto statement is used to transfer control of the program to the specified label.

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if

In C programming, if and else are used to make decisions.

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int

Int, short for Integer is a fundamental variable type built into the compiler and used to define numeric variables holding whole numbers.

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long

In this program, the sizeof operator is used to find the size of int , long , long long , double and long double variables. As you can see, the size of long int and long double variables are larger than int and double variables, respectively.

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register

The register keyword creates register variables which are much faster than normal variables.

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return

The return keyword terminates the function and returns the value.

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short

The short, long, signed and unsigned keywords are type modifiers that alter the meaning of a base data type to yield a new type

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signed

The short, long, signed and unsigned keywords are type modifiers that alter the meaning of a base data type to yield a new type

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sizeof

The sizeof keyword evaluates the size of data (a variable or a constant).

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static

The static keyword creates a static variable. The value of the static variables persists until the end of the program.

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struct

The struct keyword is used for declaring a structure. A structure can hold variables of different types under a single name.

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switch

The switch and case statement is used when a block of statements has to be executed among many blocks.

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typedef

The typedef keyword is used to explicitly associate a type with an identifier.

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union

A union is used for grouping different types of variables under a single name.

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unsigned

The short, long, signed and unsigned keywords are type modifiers that alter the meaning of a base data type to yield a new type.

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void

The void keyword meaning nothing or no value.

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volatile

The volatile keyword is used for creating volatile objects. A volatile object can be modified in an unspecified way by the hardware.

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while

The syntax of a while loop in C programming language is − while(condition) { statement(s); } Here, statement(s) may be a single statement or a block of statements. The condition may be any expression, and true is any nonzero value. The loop iterates while the condition is true

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