ctype Library | C Programming Tutorial

It gets a little trickier when you have to check the arguments in command line to see if are digit or not. With *argv[] you have to dereference the pointer to the element and check if it is a digit then use atoi function (stdlib.h) to put in an int variable. It easy when you get used.

how do you put the certain lines inside // to be as ac comment ..it is an advanced way

thank you

Hello, for clarification purposes: when using functions under the <ctype.h>, is there a need to put ' ' inside the isdigit( ) for instance?

I got some different output when using
int d = '9' and int d = 9

Nice video, thanks

Great explanation, liked the speed of your explanation