The task is to check whether the first digit of no is zero or not?
49
What is a NullPointerException, and how do I fix it?
24937
What's the best way to check if a String represents an integer in Java?
31478
Using bitwise OR 0 to floor a number
105003
Decimal number regular expression, where digit after decimal is optional
90952
Does every number not ending with zero have a multiple without zero digits at all?
36098
Checking for valid floating point number
94213
Checking if an input number is an integer
134495
What is wrong with \ifnum#1=0.09\relax?
43115
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
110331
How to match exponent that might be 1?
43229
How to check if a string contains only digits in Java
109443
Compare integer in bash, unary operator expected
58312
Why does (0 == 'Hello') return true in PHP?
134928
Check if string contains only digits
67473
How to determine if a string is a number with C++?
106634
Check if a value from scanf is a number?
116138
Identify if a string is a number