Frequency of Characters in a String using C Programming Language
To understand this example, you should have the knowledge of the following C programming topics:
#include<stdio.h>
#include<string.h>
int main()
{
int i, count = 0;
char arrayName[100], ch;
printf("Enter a string: ");
gets(arrayName);
printf("Enter a character to find its frequency: ");
scanf("%c", &ch);
for(i = 0; arrayName[i] != '\0'; i++ )
{
if( ch == arrayName[i] )
count++;
}
printf("Frequency of %c = %d", ch, count);
return 0;
}
Enter a string: Rumman Ansari
Enter a character to find its frequency: m
Frequency of m = 2
In this program, the string entered by the user is stored in arrayName.
Then, the user is asked to enter the character whose frequency is to be found. This is stored in variable ch.
Then, a for loop is used to iterate over characters of the string. In each iteration, if the character in the string is equal to the ch, count is increased by 1.
Finally, the frequency stored in the count variable is printed.
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.