# p5.js | arc() Function

• Difficulty Level : Medium
• Last Updated : 24 Oct, 2018

The arc() function is an inbuilt function in p5.js which is used to draw an arc. This function accepts seven parameters which are x-ordinate, y-ordinate, width, height, start, stop and an optional parameter mode.

Syntax:

`arc(x, y, w, h, start, stop, mode)`

Parameters: This function accepts seven parameters as mentioned above and described below:

• x: This parameter is used to hold the value of x-coordinate of the arc of ellipse.
• y: This parameter is used to hold the value of y-coordinate of the arc of ellipse.
• w: This parameter takes the value of width of the arc of ellipse.
• h: This parameter takes the value of height of the arc of ellipse.
• start: This parameter takes the value of angle to start the arc, specified in radians.
• stop: This parameter takes the value of angle to stop the arc, specified in radians.
• mode: This is an optional parameter which determines the way of drawing the arc either CHORD, PIE or OPEN
• Program 1: This program uses the DEFAULT mode.

 `function` `setup() {``    ``createCanvas(400, 400);``}`` ` `function` `draw() {``    ``background(``'gray'``);`` ` `    ``// Quarter arc at 150, 55 of height and width 290px``    ``arc(150, 55, 290, 290, 0, HALF_PI); ``    ``fill(``'lightblue'``);``}`

Output:

• Program 2: This program uses the OPEN mode.

 `function` `setup() {``    ``createCanvas(400, 400);``}`` ` `function` `draw() {``    ``background(220);``    ``fill(``'lightgreen'``);`` ` `    ``// An open arc at 150, 150 with radius 280``    ``arc(150, 150, 280, 280, 0, PI + QUARTER_PI, OPEN); ``}`

Output:

• Program 3: This program uses the CHORD mode.

 `function` `setup() {``    ``createCanvas(400, 400);``}`` ` `function` `draw() {``    ``background(220);``    ``fill(``'orange'``);`` ` `    ``// A chord-arc at 150, 150 with radius 280``    ``arc(150, 150, 280, 280, 0, PI + QUARTER_PI, CHORD); ``} `

Output:

• Program 4: This program uses PIE mode.

 `function` `setup() {``    ``createCanvas(400, 400);``}`` ` `function` `draw() {``    ``background(220);``    ``fill(``'blue'``);``     ` `    ``// A pie-arc at 150, 150 with radius 280``    ``arc(150, 150, 280, 280, 0, PI + QUARTER_PI, PIE); ``} `

Output:

References: https://p5js.org/reference/#/p5/arc

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