In Python, the `round()`

function stands as a crucial tool for precise numerical rounding. This article endeavors to elucidate its usage, applications, and significance through comprehensive examples.

**Understanding round() Function**

The `round()`

function in Python is employed for rounding floating-point numbers to a specified number of decimal places. Its syntax is as follows:

```
round(number, ndigits=None)
```

Here, `number`

represents the floating-point number to be rounded, and `ndigits`

denotes the number of decimal places (default is 0).

**Example 1: Basic Rounding**

```
num = 3.14159
rounded_num = round(num)
print("Rounded number:", rounded_num)
```

**Output 1:**

```
Rounded number: 3
```

**Example 2: Rounding to Specific Decimal Places**

```
num = 3.14159
rounded_num = round(num, 2)
print("Rounded number (2 decimal places):", rounded_num)
```

**Output 2:**

```
Rounded number (2 decimal places): 3.14
```

**Example 3: Rounding Negative Numbers**

```
num = -3.14159
rounded_num = round(num)
print("Rounded number:", rounded_num)
```

**Output 3:**

```
Rounded number: -3
```

**Example 4: Rounding with Tie-breaking**

```
num = 2.5
rounded_num = round(num)
print("Rounded number:", rounded_num)
```

**Output 4:**

```
Rounded number: 2
```

**Points to Remember**

- The
`round()`

function rounds floating-point numbers to the nearest integer by default. - Specifying
`ndigits`

allows rounding to a specific number of decimal places. `round()`

employs “round half to even” tie-breaking strategy for consistency.