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#named function def polynomial(x): return x**2 + 5*x + 4 print(polynomial(-4)) #lambda print((lambda x: x**2 + 5*x + 4) (-4

how does it works ? the line of processing please?

9th May 2017, 4:54 AM
AJITH KUMAR
AJITH KUMAR - avatar
1 Antwort
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I guess you mean how lambda functions work. If you have some background on mathematical functions, lambda x: x**2 + 5*x + 4 could be though as a single variable function: f(x) = x² + 5x + 4 Now (lambda x: x**2 + 5*x + 4)(-4) is like evaluating f(-4). If you don't have this math knowledge, think that the lambda function is like defining a procedure to compute some value, depending on a dummy variable x (the one that's left of the colon :), and the procedure itself is the one that's right of the colon. So to compute (lambda x: x**2 + 5*x + 4)(-4), just replace -4 wherever x appears: (lambda x: x**2 + 5*x + 4)(-4) = (-4)**2 + 5*(-4) + 4 = 16 - 20 + 4 = 0
9th May 2017, 5:14 AM
Álvaro