C Program to find First Capital Letter in String
Write a C Program to find First Capital Letter in String using Recursion. Here’s simple Program to find First Capital Letter in String using Recursion in C Programming Language.
Recursion : :
- Recursion is the process of repeating items in a self-similar way. In programming languages, if a program allows you to call a function inside the same function, then it is called a recursive call of the function.
- The C programming language supports recursion, i.e., a function to call itself. But while using recursion, programmers need to be careful to define an exit condition from the function, otherwise it will go into an infinite loop.
- Recursive functions are very useful to solve many mathematical problems, such as calculating the factorial of a number, generating Fibonacci series, etc.
Problem : :
The following C program, using recursion, finds the first capital letter that exists in a string. We have included ctype.h in order to make use of “isupper(char);” function that’s defined inside the ctype.h headerfile.
The isupper() function returns 1 if the passed character is an uppercase and returns 0 is the passed character is a lowercase.
Here is the source code of the C program to find the first capital letter in a string using recursion. The C program is successfully compiled and run on a Windows system. The program output is also shown below.
SOURCE CODE : :
/* C program to find the first capital letter in a string using recursion */
char caps_check(char *);
char string, letter;
printf("Enter a string to find it's first capital letter: ");
letter = caps_check(string);
if (letter == 0)
printf("No capital letter is present in %s.\n", string);
printf("The first capital letter in %s is %c.\n", string, letter); }
char caps_check(char *string)
static int i = 0;
if (i < strlen(string))
i = i + 1;
else return 0;
Enter a string to find it's first capital letter: codezClub
The first capital letter in codezClub is C.
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