Write a program to input a string from the user and calculate the length of that without using library function
Answers
Answer:
#include<stdio.h>
int main() {
char str[100];
int length;
printf("\nEnter the String : ");
gets(str);
length = 0; // Initial Length
while (str[length] != '\0')
length++;
printf("\nLength of the String is : %d", length);
return(0);
}
Explanation:
In the above program we have accepted the string from the user.
printf("\nEnter the String : ");
gets(str);
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printf("\nEnter the String : ");
gets(str);
After that we have initialized the length variable with zero. “length” variable is used to keep track of the number of character accessed.
length = 0; // Initial Length
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length = 0; // Initial Length
Initially length is 0. Now we are accessing very first character. If it is equal to NULL then we are terminating the loop else we are incrementing the length.
while (str[length] != '\0')
length++;
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while (str[length] != '\0')
length++;
Dry Run :
Consider input string – “mumbai”.
While loop Iteration length str[length]
Before While Loop 0 m
After Iteration 1 1 u
After Iteration 2 2 m
After Iteration 3 3 b
After Iteration 4 4 a
After Iteration 5 5 i
After Iteration 7 6 Loop Terminated
Now last step is to print the length of the string –
printf("\nLength of the String is : %d", length);
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printf("\nLength of the String is : %d", length);