15. Functions

• What was square( i ) ?

  • It was call of the function named square()

  
      int square( int x )
      {
           return x * x;
      }
  
  

• We define a function when we want to separate a computation because it

  • is logically separate

  • makes the program text clearer (by naming the computation)

  • is useful in more than one place in our program

  • eases testing, distribution of labor, and maintenance