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Natural numbers recursive multiplication
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| def mult(a,b) | |
| return 0 if a == 0 || b == 0 | |
| if a == 1 | |
| b | |
| else | |
| b+mult(a-1,b) | |
| end | |
| end | |
| puts mult(7,7) # 49 | |
| puts mult(0,7) # 0 | |
| puts mult(7,0) # 0 | |
| puts mult(4,7) # 28 | |
| puts mult(9,2) # 18 | |
| puts mult(4,6) # 24 | |
| puts mult(6,1) # 6 | |
| puts mult(1, 6) # 6 |
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