---
title: "What are Manipulators?"  
description: "What are Manipulators?"  
author: "Shikhar Arora"  
published: 2019-12-06  
canonical: https://answers.mindstick.com/qa/92525/what-are-manipulators  
category: "technology"  
tags: ["software engineering", "programming language"]  
reading_time: 2 minutes  

---

# What are Manipulators?

What are Manipulators

## Answers

### Answer by Rahul Roi

## The Manipulators in C++

## The Manipulators are helping functions that can modify the input/output stream. Here, It does not mean that we change the value of a variable, it only modifies the I/O stream using insertion (<<) and extraction (>>) operators.

For example, if we want to print the hexadecimal value of 100 then we can print it as:

```
cout<<setbase(16)<<100
```

## The types of Manipulators

These are various types of manipulators:

## (1). Manipulators without arguments

- endl
- ws
- ends
- flush

## (2). Manipulators with Arguments

**Some important manipulators in <iomanip> are**

- setw (val)
- setfill (c)
- setprecision (val)
- setbase(val)
- setiosflags(flag)
- resetiosflags(m)

**Some important manipulators in <ios> are**

- showpos
- noshowpos
- showbase
- uppercase
- nouppercase
- fixed
- scientific
- hex
- dec
- oct
- left
- right

**For Testing :-**\

```
#include <iostream>
#include <istream>
#include <sstream>
#include <string>

using namespace std;

int main()
{
    istringstream str("Programmer");
    string line;
    // Ignore all the whitespace in string
    // str before the first word.
    getline(str >> std::ws, line);

    // you can also write str>>ws
    // After printing the output it will automatically
    // write a new line in the output stream.
    cout << line << endl;

    // without flush, the output will be the same.
    cout << "only a test" << flush;

    // Use of ends Manipulator
    cout << "\na";

    // NULL character will be added in the Output
    cout << "b" << ends;
    cout << "c" << endl;

    return 0;
} 
```

**Output**

```
Programmer
only a test
abc
```

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