Index - C
| ceiling | Prelude |
| characters | Prelude |
| circle | Prelude |
| clipped | Prelude |
| closedCurve | Prelude |
| closedCurvePoints | Extras.Cw |
| codeWorldLogo | Prelude |
| Color | Prelude |
| colored | Prelude |
| colorNamed | Extras.Colors |
| Colour | Prelude |
| coloured | Prelude |
| concatenation | Prelude |
| constant | Parameter |
| contains | Prelude |
| converted | Parameter |
| coordinatePlane | Prelude |
| cos | Prelude |
| counter | |
| 1 (Function) | Parameter |
| 2 (Function) | Extras.Widget |
| cumulativeSums | Extras.Util |
| currentHour | Parameter |
| currentMinute | Parameter |
| currentSecond | Parameter |
| curve | Prelude |
| customGraphed | Extras.Cw |
| customTurtle | Extras.Turtle |