Pointers: A pointer is a variable which stores the address of another variable which can be used to access data without referring to the data identifier directly. Pointers are identifiers for addresses for addresses whereas data variable are identifiers for the data. Pointer variable: A pointer variable s a variable that holds the address of another variable Program: Output: Explanation: In this program initially a variable of data type integer is declared i.e. n with its content as 0. Later the content of the variable n Is displayed i.e. 0 The address of the variable n is referred by using … Continue reading POINTERS

Recursion: Recursion is a repetitive process in which a function calls itself. –In recursion it calls itself directly or indirectly to solve a smaller version of its task until a final call is called which doesn’t require any other self call. Source code: #include <stdio.h> int recursivefactorial(int n); int main(){     int n;     printf(“\n enter the value to find the factorial”);     scanf(“%d”,&n);     int fact=recursivefactorial(n);     if(fact!=0)     printf(“\n the result is %d\n”,fact); } int recursivefactorial(int x){   if(x==0 || x==1)       return 1;   else if(x<0){         printf(“\n negative numbers not allowed”);         return 0;   } … Continue reading RECURSION

A computer cannot perform all the tasks by itself.So it utilises the entities named functions.But what is a function?According to Wikipedia a function means to work or operate in a particular way.Similarly a function in C also performs a desired task according to the user requirements. Definition:A function is a self contained block of code that performs a particular task of acting on data and may return a value. Function prototype:Datatype function_name(datatype variable-1,datatype variable-2,_ _ _ _){            Local declarations;            Executable statements;             Return statement;}The part within the curly braces is called the body of the program and the initial line is … Continue reading FUNCTIONS

Loop statements are used when we want to execute some line of code repeatedly. For loops are used when we know the number of times we run the loop. while loops are used when we are not sure about the number of times we run the loop. Syntax:FOR loop:for(counter_variable initialization;for_condition; counter_variable increment/decrement){        statements;} In For loop parenthesis we have three parts. First is for initialisation, Second is for condition and third is to increment or decrement  the counter variable.First the variable is initialised. Then the condition is checked. If the condition evaluates to be true then compiler will execute … Continue reading LOOP STATEMENTS

Switch case changes the direction of flow of control with respect to the input. The condition in switch statement is compared with case statements in the switch block.when the switch condition and case condition both are equal, the statements in that specific case block are executed. Using default statement is optional but it is preferred to handle errors when switch condition does not matches with any of the case conditions. Therefore, the statements in the default block executes only if the switch condition does not matches with any of the case conditions.Using break statement is optional. Note: If there is … Continue reading SWITCH CASE

In order to understand conditional statements, first we need to understand conditions.In C, conditions are logical statements whose final value will be either true(it is generally represented as integer 1 or any non-zero integer ) or false(it is represented as 0)In logical statements, we need to use logical operators.Some of the logical operators are:·        == (if L.H.S and R.H.S are equal then this operator returns true(1) else returns false(0))Example: (2+1)==3 returns true and 2==3 returns false·        < (if L.H.S is less than R.H.S then this operator returns true(1) else returns false(0))Example: 2<3 returns true and 5<4 returns false·        > (if L.H.S greater than … Continue reading UNDERSTANDING CONDITIONAL STATEMENTS

In order to run C programs you need a C compiler which compiles and executes your C program. There are many online websites where you can run your C programs. https://www.onlinegdb.com/online_c_compiler https://www.tutorialspoint.com/compile_c_online.php http:// https://repl.it/ You can download Dev C++ compiler. … Continue reading Head start