14 Jan String Functions in C
C provides several standard library functions to work with strings. To work with string functions in C language, use the following header file:
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string.h |
Include it in your program file:
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#include <string.h> |
Let us now see some popular string functions in C language and what they will return after execution:
- strlen(): returns the length of a given string
- strcmp(): compares two strings
- strcpy(): copies one string to another
- strcat(): concatenates two strings
Let us see an example implementing all the above string functions:
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#include <stdio.h> #include <string.h> int main() { char str1[20] = "Hello"; char str2[20]; // Copying string strcpy(str2, str1); printf("str2 after strcpy: %s\n", str2); // Concatenating strings strcat(str1, ", Amit!"); printf("str1 after strcat: %s\n", str1); // String length int len = strlen(str1); printf("Length of str1: %d\n", len); // Comparing strings int result = strcmp(str1, str2); if (result == 0) { printf("str1 and str2 are equal\n"); } else { printf("str1 and str2 are not equal\n"); } return 0; } |
Output
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str2 after strcpy: Hello str1 after strcat: Hello, Amit! Length of str1: 12 str1 and str2 are not equal |
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