How do I convert a string to all upper or lower case?
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Answer / Anant Singh
To convert a string to uppercase, you can use the `toupper()` function. To convert a string to lowercase, you can use the `tolower()` function. Here's an example of converting a string to uppercase:nn```cn#include <stdio.h>n#include <ctype.h>nnint main() {n char str[] = "Hello World!";n int i = 0;n while(str[i] != ' ') {n printf("%c", toupper(str[i]));n i++;n }nprintf("n");nreturn 0;n}n```
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