Course Content

# C Basics

C Basics

## Comparison Operators

### Understanding Comparison Operators

Comparison operators let you **evaluate and compare** values. One of the trickier aspects of these operators is remembering the correct order or arrangement of the symbols, like determining whether `<`

or `=`

should come first.

Below is a table of commonly used comparison operators:

Operation | Symbol | Usage Example |

Equality | `==` | `a == b` |

Inequality | `!=` | `a != b` |

Greater than | `>` | `a > b` |

Less than | `<` | `a < b` |

Greater than or equal to | `>=` | `a >= b` |

Less than or equal to | `<=` | `a <= b` |

When these operators are used in a program, the outcome will be either `true`

or `false`

. In the context of programming, `true`

is typically represented as `1`

, and `false`

is represented as `0`

.

Main.c

You'll frequently see comparison operators in loops and conditional statements.

### Operator Precedence

Grasping the order of operations, or operator precedence, is crucial.

NoteConsider the equation: 2 + 2 * 2. What's your answer? If you thought it's 8, don't worry — you're not alone. Even the course creator has had moments of math confusion.

When it comes to precedence, the increment (`++`

) and decrement (`--`

) operators are evaluated first. This is followed by the multiplication (`*`

) and division (`/`

) operators. Lastly, the addition (`+`

) and subtraction (`-`

) operators are evaluated.

Take this code for instance:

To clarify the order of operations, you can use parentheses. So, the expression:

Can be more explicitly written as:

Everything was clear?