Array & string
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Arrays are collections of homogeneous data that can be accessed by index position. Arrays allow storing of multiple similar data types together, start indexing at 0, and can have more than one dimension. Common string functions include strlen to find string length, strrev to reverse a string, strcat to concatenate strings, strcpy to copy strings, and strcmp and strcmpi to compare strings with and without case sensitivity.
![Arrays(Contd.)
Array index starts with zero
The last index in an array is num – 1 where num is the no
of elements in a array
int a[5] is an array that stores 5 integers
a[0] is the first element where as a[4] is the fifth element
We can also have arrays with more than one dimension
float a[5][5] is a two dimensional array. It can store 5x5 =
25 floating point numbers
The bounds are a[0][0] to a[4][4]](https://image.slidesharecdn.com/arraystring-140430032149-phpapp01/85/Array-string-3-320.jpg)
Array & string
- 1. ARRAYS
- 2. ARRAYS Arrays are collection of data that belong to similar data type Arrays are collection of homogeneous data Array elements can be accessed by its position in the array called as index
- 3. Arrays(Contd.) Array index starts with zero The last index in an array is num – 1 where num is the no of elements in a array int a[5] is an array that stores 5 integers a[0] is the first element where as a[4] is the fifth element We can also have arrays with more than one dimension float a[5][5] is a two dimensional array. It can store 5x5 = 25 floating point numbers The bounds are a[0][0] to a[4][4]
- 4. String functions strlen(str) – To find length of string str strrev(str) – Reverses the string str as rts strcat(str1,str2) – Appends str2 to str1 and returns str1 strcpy(st1,st2) – copies the content of st2 to st1 strcmp(s1,s2) – Compares the two string s1 and s2 strcmpi(s1,s2) – Case insensitive comparison of strings
Editor's Notes
- #5: Header file to be included is string.h