## C Program to Enter an Operator and Two Operands and Perform the Operation

In this program, the user is asked to enter any one of the operators +, -, *, / and also two operands. The operation chosen by the user is carried out on the two operands.

In this program, the user is asked to enter any one of the operators +, -, *, / and also two operands. The operation chosen by the user is carried out on the two operands.

This C program displays the name of the day by asking the user to input a number. For example, if the user enters 1 then *“SUNDAY”* is displayed, if the user enters 2 then *“MONDAY”* is displayed and so on. The C program code to display the day name according to number you entered are as follows.

A year that has 366 days is called a leap year.

A year can be checked whether a year is leap year or not by dividing the year by 4, 100 and 400. If a number is divisible by 4 but not by 100 then, it is a leap year. Also, if a number is divisible by 4, 100 and 400 then it is a leap year. Otherwise the year is not a leap year.

To find the largest among 3 numbers entered by the user in C programming, nested if can be used which is implemented in following program:

Armstrong number is the number whose sum of cube of individual digits is the number itself. For example: 153, 407 etc.

153 = 1^{3}+ 5^{3}+ 3^{3}// Armstrong Number

Example: Source Code to Check Armstrong Number

The characters A, E, I, O, U are known as vowels. The remaining 21 characters of English alphabets are known as consonants.

A character is said to be in uppercase if it is in capital letter and it is said to be in lowercase if it is in small letter. C program to check whether an entered character is in uppercase of lowercase is shown below.

A palindrome number is a number whose reverse is the original number. Some examples of palindrome number are: 121, 12321, 515, etc. C program to check whether the number is palindrome or not is shown below.

A quadratic equation is an equation of the form *ax ^{2 }+ bx + c = 0 *where a, b and c are constants.

And the formula to calculate the roots of the quadratic equation is:

C program to find the roots of a quadratic equation is shown below.

An integer that can be exactly divided by 2 is known as an even number. An integer that cannot be exactly divided by 2 is known as an odd number. In other words, a digit that contains 0, 2, 4, 6 or 8 as its last digit is known as even number.