C Programming Code Examples
C > If Else and Switch Case Code Examples
Program to Check if a given Integer is Positive or Negative
/* Program to Check if a given Integer is Positive or Negative
The program takes the given integer and checks whether the integer is positive or negative.
- Take the integer which you want to check as input.
- Check if it is greater or lesser than zero and print the output accordingly. */
#include <stdio.h>
void main()
{
int number;
printf("Enter a number \n");
scanf("%d", &number);
if (number >= 0)
printf("%d is a positive number \n", number);
else
printf("%d is a negative number \n", number);
}
/* Take the integer which you want to check as input and store it in a variable number.
Using if, else statements check whether the integer is greater or lesser than zero.
If it is greater than or equal to zero, then print the ouput as "it is a positive number".
If it is lesser than zero, then print the ouput as "it is a negative number". */
Read formatted data from stdin. Reads data from stdin and stores them according to the parameter format into the locations pointed by the additional arguments. The additional arguments should point to already allocated objects of the type specified by their corresponding format specifier within the format string. In C programming, scanf() is one of the commonly used function to take input from the user. The scanf() function reads formatted input from the standard input such as keyboards. The scanf() function enables the programmer to accept formatted inputs to the application or production code. Moreover, by using this function, the users can provide dynamic input values to the application.
In C, the "main" function is treated the same as every function, it has a return type (and in some cases accepts inputs via parameters). The only difference is that the main function is "called" by the operating system when the user runs the program. Thus the main function is always the first code executed when a program starts. main() function is a user defined, body of the function is defined by the programmer or we can say main() is programmer/user implemented function, whose prototype is predefined in the compiler. Hence we can say that main() in c programming is user defined as well as predefined because it's prototype is predefined. main() is a system (compiler) declared function whose defined by the user, which is invoked automatically by the operating system when program is being executed.
Relational Operators are the operators used to create a relationship and compare the values of two operands. For example, there are two numbers, 5 and 15, and we can get the greatest number using the greater than operator (>) that returns 15 as the greatest or larger number to the 5. Following are the various types of relational operators in C. Equal To Operator (==) is used to compare both operands and returns 1 if both are equal or the same, and 0 represents the operands that are not equal. Not Equal To Operator (!=) is the opposite of the Equal To Operator and is represented as the (!=) operator. The Not Equal To Operator compares two operands and returns 1 if both operands are not the same; otherwise, it returns 0.
The if-else statement is used to perform two operations for a single condition. The if-else statement is an extension to the if statement using which, we can perform two different operations, i.e., one is for the correctness of that condition, and the other is for the incorrectness of the condition. Here, we must notice that if and else block cannot be executed simiulteneously. Using if-else statement is always preferable since it always invokes an otherwise case with every if condition.
#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. These files are mainly imported from an outside source into the current program. The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This type of preprocessor directive tells the compiler to include a file in the source code program. Here are the two types of file that can be included using #include:
Writes the C string pointed by format to the standard output (stdout). If format includes format specifiers (subsequences beginning with %), the additional arguments following format are formatted and inserted in the resulting string replacing their respective specifiers. printf format string refers to a control parameter used by a class of functions in the input/output libraries of C programming language. The string is written in a simple template language: characters are usually copied literally into the function's output, but format specifiers, which start with a % character, indicate the location and method to translate a piece of data (such as a number) to characters. "printf" is the name of one of the main C output functions, and stands for "print formatted". printf format strings are complementary to scanf format strings, which provide formatted input (parsing). In both cases these provide simple functionality and fixed format compared to more sophisticated and flexible template engines or parsers,
C program to input amount from user & print minimum number of notes (Rs. 500, 100, 50, 20, 10, 5, 2, 1) required for the amount. Input amount from user. Store it in a variable 'amt'.
Code count the Number of Occurrences of an element in the linked list using recursion. This C Program uses recursive function & finds the occurrence for an element in an unsorted list.
C language code, using iteration, searches for a given node in a tree. The tree we have used is the binary search tree. A binary search tree follows a concept of nodes whose numbers...
Firstly initialize the ATM pin and amount with some random number. Then take ATM pin as input. If the input pin is equal to initialized pin, then do the further operations. switch...
C Program Lowest order or first set bit of any number is the first bit set starting from left to right. Lowest order set bit of any odd number is 0 since first bit of any odd number is always
C Program 'counts the occurrences' of each C keyword by array structure. "C keywords" are the words which have a definition and cannot be used as an identifier. Continue, double, for
C language program to input a number from user and count number of digits in the given integer using loop. First logic is the easiest and is the common to think. It uses loop to
