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EARNINGS PER SHARE CALCULATION | 9 Months Ended
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Jul. 31, 2021
Earnings Per Share [Abstract] |
EARNINGS PER SHARE CALCULATION | EARNINGS PER SHARE CALCULATION The following table presents the calculation of basic and diluted net income per share (in thousands, except per share amounts):
| Quarter Ended |  | Nine Months Ended
| July 31, |  | August 1, |  | July 31, |  | August 1,
| 2021 |  | 2020 |  | 2021 |  | 2020
Net income | $ | 238,232 |  |  | $ | 142,267 |  |  | $ | 396,697 |  |  | $ | 296,250 |
Basic weighted average shares outstanding | 155,271 |  |  | 154,184 |  |  | 155,277 |  |  | 154,136 |
Effect of dilutive potential common shares | 1,473 |  |  | 2,134 |  |  | 1,465 |  |  | 1,605 |
Diluted weighted average shares | 156,744 |  |  | 156,318 |  |  | 156,742 |  |  | 155,741 |
Basic EPS | $ | 1.53 |  |  | $ | 0.92 |  |  | $ | 2.55 |  |  | $ | 1.92 |
Diluted EPS | $ | 1.52 |  |  | $ | 0.91 |  |  | $ | 2.53 |  |  | $ | 1.90 |
Antidilutive employee share-based awards, excluded | 131 |  |  | 13 |  |  | 99 |  |  | 316 |
Basic net income per common share (“Basic EPS”) is computed using the weighted average number of common shares outstanding. Diluted net income per potential common share (“Diluted EPS”) is computed using the weighted average number of the following, in each case, to the extent the effect is not anti-dilutive: (i) common shares outstanding; (ii) shares issuable upon vesting of stock unit awards; and (iii) shares issuable under Ciena’s employee stock purchase plan and upon exercise of outstanding stock options, using the treasury stock method.

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