Creating a component in ReactJS involves defining a new function or class which will generate an HTML-like syntax referred to as JSX. This JSX syntax can be inserted into other components or used for a root level render.

React components can be either functional components or class components.

1. Functional Component:

```
import React from ‘react’;

function Welcome(props) { return

Hello, {props.name}

;
}
export default Welcome;
```

1. Class Component:

\`\`\`jsx
import React, { Component } from ‘react’;

class Welcome extends Component { render() { return

Hello, {this.props.name}

; }
}

export default Welcome;
\`\`\`

In both examples, the created `Welcome` component can be used elsewhere in your application like this:

\`\`\`jsx
import Welcome from ‘./Welcome’;

;
\`\`\`

It is also good practice to keep components in separate files and always start component names with a capital letter.

How can I create a component in Reactjs?

Hello, {props.name}

Hello, {this.props.name}