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Strings in C

Strings in C Strings are defined as an array of characters. The difference between a character array and a string is the string is terminated with a special character ‘\0’. Declaration of strings: Declaring a string is as simple as declaring a one dimensional array. Below is the basic syntax for declaring a string. charstr_name[size]; In the above syntax str_name is any name given to the string variable and size is used define the length of the string, i.e the number of characters strings will store. Please keep in mind that there is an extra terminating character which is the Null character (‘\0’) used to indicate termination of string which differs strings from normal character arrays. Initializing a String: A string can be initialized in different ways. We will explain this with the help of an example. Below is an example to declare a string with name as str and initialize it with “cek”. 1. charstr[] = "cek"; 2. charstr[50] = "cek"; 3. charstr[] = {'c','…
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Arrays in C

An array is a collection of data items, all of the same type, accessed using a common name. A one-dimensional array is like a list(vector); A two dimensional array is like a table(matrix). We can have more dimensions. Always, Contiguous (adjacent) memory locations are used to store array elements in memory. Declaring Arrays Array variables are declared identically to variables of their data type, except that the variable name is followed by one pair of square [ ] brackets for each dimension of the array. Uninitialized arrays must have the dimensions of their rows, columns, etc. listed within the square brackets. Dimensions used when declaring arrays in C must be positive integral constants or constant expressions. In C99, dimensions must still be positive integers, but variables can be used, so long as the variable has a positive value at the time the array is declared. ( Space is allocated only once, at the time the array is declared. The array does NOT…

Control Statements in C

Control statements enable us to specify the flow of program control; ie, the order in which the instructions in a program must be executed. They make it possible to make decisions, to perform tasks repeatedly or to jump from one section of code to another.
There are four types of control statements in C:
Decision making statements Selection statements Iteration statements Jump statements
1.Decision Making Statement: the if-else Statement The if-else statement is used to carry out a logical test and then take one of two possible actions depending on the outcome of the test (ie, whether the outcome is true or false).
Syntax:
if (condition){statements}else{statements} If the condition specified in the if statement evaluates to true, the statements inside the if-block are executed and then the control gets transferred to the statement immediately after the if-block. Even if the condition is false and no else-block is present, control gets transferred to the statement immediately a…