String functions

Question 1

gets()

Answer 1

It reads characters from the keyboard until it reaches a newline character
(\n)

Question 2

puts()

Answer 2

Requires an argument as a pointer to a string.
Stops accepting characters to output when it encounters the null character.
When puts() finally finds the closing null character, it replaces it with a newline character.
Each string displayed by puts() function is placed on a new line

Question 3

getchar()

Answer 3

Takes no arguments and it returns the next character from the input.
After typing in a character you have to use carriage return to return the
character to the function call.
Deals with characters

Question 4

strlen()

Answer 4

It returns length of the string without including end character
size_t strlen(const char *str)

Question 5

sizeof()

Answer 5

It returns the total allocated size assigned to the array
size_t sizeof(const char *str)

Question 6

strcmp

Answer 6

It compares two strings and returns an
integer value.
If equal= function return 0 if
str1 < str2 OR str1 is
a substring of str2 then it returns a negative value.
If str1 > str2 then it returns
a positive value
int strcmp(const char *str1, const char *str2)

Question 7

strcat()

Answer 7

Concatenates two strings and returns the concatenated string.
char * strcat(char *str1, char *str2)

Question 8

strlwr

Answer 8

char * strlwr( char *str) : converts a string to lowercas

Question 9

strupr()

Answer 9

char * strupr( char *str) : converts a string to uppercase

Question 10

strrev()

Answer 10

char * strrev( char *str) : reverses a string

Question 11

stchr()

Answer 11

char * strchr( char *str) : finds first occurrence of given character in string

Question 12

strstrr

Answer 12

char * strstrr( char *str) : finds first occurrence of given string in another string

Question 13

strcpy()

Answer 13

char * strcpy( char *str1, char *str2)
It copies the string str2 into string str1, including the end character.