As a building is made of bricks, a c program is made of basic elements such as expressions, statements, statement blocks, constants, and variables.

ex. i=1, symbol '1' represents the constants and symbol 'i' represents the variable.

for ex: (4+8)*6-i+7.

+ addition

- subtraction

* mmultiplication

/ division

% remainder

e.g i=8;

e.g {

s4=9-7;

s3=s4+i;

.

.

.

}

**constants and variables:**A constant is a value that never changes while a variable can be used to present different values.ex. i=1, symbol '1' represents the constants and symbol 'i' represents the variable.

**Expressions:**An expression is combination of constants, variables and operators that are used to denote the computations.for ex: (4+8)*6-i+7.

**C-Arithmetic operator:****symbol meaning**+ addition

- subtraction

* mmultiplication

/ division

% remainder

**Statements:**A statement is a complete instruction, ending with a semicolon.e.g i=8;

**Statement Blocks:**A group of statements can form a statement block that starts with an opening brace ({) and ends with a closing brace (}).e.g {

s4=9-7;

s3=s4+i;

.

.

.

}

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