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C program to find the first capital letter in a string without using recursion

Here, we are going to learn how to find the first capital letter in a string without using recursion in C programming language?
Submitted by Nidhi, on July 18, 2021

Problem Solution:

Read a string from the user and find the first capital letter in a string without using recursion.

Program:

The source code to find the first capital letter in a string without using recursion is given below. The given program is compiled and executed using GCC compile on UBUNTU 18.04 OS successfully.

// C program to find the first capital letter
// in a string without using recursion

#include <stdio.h>

int main()
{
    char str[64];
    char cap = 0;
    int i = 0;

    printf("Enter string: ");
    scanf("%[^\n]s", str);

    while (str[i] != 0) {
        if (str[i] >= 'A' && str[i] <= 'Z') {
            cap = str[i];
            break;
        }
        i++;
    }

    if (cap == 0)
        printf("Capital letter is not found in the string\n");
    else
        printf("First Capital letter is: %c\n", cap);

    return 0;
}

Output:

RUN 1:
Enter string: Hello world, How are you?
First Capital letter is: H

RUN 2:
Enter string: hi, my name is Alex!
First Capital letter is: A

RUN 3:
Enter string: www.includehelp.com
Capital letter is not found in the string

Explanation:

In the main() function, we read the value of string str from the user. Then we found the first capital letter in the string without using recursion and printed the result on the console screen.

C String Programs »


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