1. CSCE 206 Lab Structured Programming in C
Fall 2018
Lecture 5
Ehsanul Haque Nirjhar

2. Function Block of code to perform a specific task
A large problem can be solved using different functions
User defined functions can take different parameters and return a result, which can be used in the main function
Example: pow(base, exponent)takes 2 parameters as input and returns a result. It is a built-in function; not user- defined.

3. Function Syntax

4. Function Calling

5. Function Calling

6. Practice Problem-1
Write a program that reads in an integer value for n and then sums the integers from n to 2*n if n is nonnegative, or from 2 * n to n if n is negative.
Hint: Use function for the summation of series.

7. Practice Problem-2
Write a program that prints all the prime numbers from 2 to
Hint: Use function to check whether a number is prime or not.