c# check if string is all numbers
if (str.All(char.IsDigit)) {
// String only contains numbers
}c# check if string is all numbers
if (str.All(char.IsDigit)) {
// String only contains numbers
}c check if char is number
char c = 'a'; // or whatever
if (isalpha(c)) {
puts("it's a letter");
} else if (isdigit(c)) {
puts("it's a digit");
} else {
puts("something else?");
}Copyright © 2021 Codeinu
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