IOMANIP

This provides a set of stream manipulators that allow precise control over input and output formatting, particularly for use with cin and cout. It includes tools to set field width (setw), control number precision (setprecision), align text (left, right, internal), fill empty spaces (setfill), and format numbers in fixed-point, scientific, or hexadecimal notation (fixed, scientific, hexfloat). These manipulators are especially useful when formatting output for tables, reports, or aligning numerical data. Being part of the C++ Standard Library, <iomanip> works seamlessly with iostream and offers a clean, readable way to handle formatting without resorting to lower-level C-style functions like printf().