Discussion Forum
Que.  The minimum number of temporary variables needed to swap the contents of two variables is 
a.  1 
b.  2 
c.  3 
d.  0 
Answer:0 
Noor Ali :(September 20, 2022)
confused ? need guidance .

A minimum number of temporary variable needed to swap the contents of 2 variable is 0. To swap the two numbers youc an follow the following steps n variables a, b a=a+b; b=ab; a=ab; or a=a×b; b=a÷b; a=a÷b; So, no temporary variables is needed The swapping can easily be done without any other temporary variable with the above method or series. 
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