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SWAP

7) C Program to swap two number:-

(A) BY USING THIRD VARIABLE:-

 LOGIC:- let there are two variable a=10,b=20, by swapping we want variable a =20 and b=10.Here we use third variable c. In c we assign any one variable from a and b (c=a or c=b),then other variable which we did not assign in c .Assign that variable in that variable which is assign into c.

 EXAMPLE:-


(B) WITHOUT USING THIRD VARIABLE:-

 LOGIC:- now swapping is done by using only a and b.In this case 3 steps are required.
               1) a=a+b;(a=10+20,a=30).
               2) b=a-b(b=30-20=>10 which is equal to = a initial value) and 
               3) last if we apply a=a-b(a=30-10=>20 which is equal to = b initial value)  

 EXAMPLE:-

TASK:-"""TRY SWAPPING A CHARACTER""" 

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