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Last active August 29, 2015 14:03
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SICP Exercise 1.4
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Exercise1-4.md 
(define (a-plus-abs-b a b)
  ((if (> b 0) + -) a b))

When the if function is evaluated, based on the condition, the operator + or - is applied on the operands a and b. If b > 0, + operator is used, evaluating to a+b. Otherwise, - operator is issued which yields a-b. Ultimately, we evaluate a+|b|.

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