 ## Program to calculate factorial of number n and find out permutation and combination using return type.

Problem Analysis: The problem is to calculate the factorial of a given number and find out permutation and combination using the factorial calculated. Code:   Outputs: Enter a… ## Program to calculate sum of first 50 natural numbers using recursive function.

Problem Analysis: The problem is to calculate the sum of first 50 natural numbers using recursive function. Code:   Outputs: the sum of first 50 natural numbers is… ## Program to add, subtract, multiply and divide two integers using user defined type function with return type.

Problem Analysis the problem is to write a program to add, subtract, multiply and divide two integers using user defined type function with return type. Codes: Output: enter two… ## Program to find GCD(greatest common divisor or HCF) and LCM(least common multiple) of two numbers.

Problem Analysis: The problem is to input the two integers from the user and display their GCD and LCM.for this,the necessary parameters and header files are given below…. ## Program to input two integer numbers and display the sum of even numbers between these two input numbers.

Problem Analysis: The problem is to input the two integers from the user and displays the sum of even numbers between them.For this we need two input variables(a,b)… ## Program to read the values for coefficients a,b and c of a quadratic equation ax²+bx+c=0.

Problem Analysis: The problem is to read the values of coefficient a,b,c of quadratic equation ax²+bx+c=0 and to find the equation of the roots. i.e. r1 =(-b + sqrt… ## Program to check whether the entered year is leap year or not( a year is leap if it is divisible by 4 and divisible by 100 or 400)

Problem Analysis: The problem is to check whether the entered year is leap year or not ( a year is leap if it is divisible by 4 and… ## Program to get the input of two or higher digit integer number and display in reverse order.

Problem Analysis: The problem is to get the input of two or higher digit integer number and display in reverse order. i.e. digit = num%10; rev= rev*10 +… ## Program to check whether the input alphabet is vowel or not by using if else and switch statements.

Problem Analysis: The problem is to check whether the input alphabets is vowel or not by using if else and switch statements.   Algorithm 1:  (using if else)… ## Program to print the size of char,float.double,and long double data types in C.

Problem Analysis: The problem is to print the size of char,float,double and long double data types in C. The output is to print the size of the data…