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Net Income Per Share | 3 Months Ended
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Apr. 30, 2021
Earnings Per Share [Abstract] |
Net Income Per Share | Net Income Per Share Basic net income per share is computed using the weighted average number of shares of common stock outstanding for the period, excluding stock options and restricted stock units. Diluted net income per share is based upon the weighted average number of shares of common stock outstanding for the period and potentially dilutive common shares, including the effect of stock options and restricted stock units under the treasury stock method. The following table sets forth the computation of the numerators and denominators used in the basic and diluted net income per share amounts:
| Three Months Ended April 30, |  |
| 2021 |  | 2020 |  |  |  |
Numerator: |  |  |  |  |  |  |
Net income | $ | 155.6 |  |  | $ | 66.5 |  |  |  |  |
Denominator: |  |  |  |  |  |  |
Denominator for basic net income per share—weighted average shares | 219.6 |  |  | 219.2 |  |  |  |  |
Effect of dilutive securities | 2.4 |  |  | 2.1 |  |  |  |  |
Denominator for dilutive net income per share | 222.0 |  |  | 221.3 |  |  |  |  |
Basic net income per share | $ | 0.71 |  |  | $ | 0.30 |  |  |  |  |
Diluted net income per share | $ | 0.70 |  |  | $ | 0.30 |  |  |  |  |
The computation of diluted net income per share does not include shares that are anti-dilutive under the treasury stock method because their exercise prices are higher than the average market value of Autodesk’s stock during the periods. For the three months ended April 30, 2021 and 2020, there were 0.4 million and no potentially anti-dilutive shares excluded from the computation of diluted net income per share, respectively.

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