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C Basics
C Basics
Sum, Difference, Increment, Decrement
Addition Operator (+)
The + operator adds the values on either side of it.
You can also use variables in place of direct values.
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Note
While some programming languages allow you to concatenate strings using the
+operator, like "Hell" + "o" = "Hello", C does not.
Subtraction Operator (-)
The subtraction operator, -, calculates the difference between the values on either side of it.
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You can also use the - sign to convert positive values to their negative counterparts.
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Increment Operator (++)
The increment operator, ++, was introduced to simplify code readability.
This operator adds 1 to a value, and it's commonly used in loops. The example above illustrates the most basic use of the operator.
Decrement Operator (--)
Conversely, the decrement operator, --, subtracts 1 from a value:
Pre vs. Post Increment
Increment and decrement operators come in two forms:
- prefix (++a);
- postfix (a++).
The distinction lies in the values they return:
| Operator | Usage | Description |
++ | a++ | Increments a by 1 but returns its original value |
++ | ++a | Increments a by 1 and returns its incremented value |
-- | --a | Decreases a by 1 and returns its decremented value |
-- | a-- | Decreases a by 1 but returns its original value |
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