There are many techniques to find the first digit of a number using Python language. We will discuss it using typecast, iteration method, list method and math function.
Python code to print the first digit of a number using typecast
Code:
num = int(input("Enter number: "))
num_str = str(num)
print(num_str[0])
Output:
Enter number: 34501 3
Python code to print the first digit of a number using iteration
Code:
num = int(input("Enter number: "))
first_digit_of_number = num
while (first_digit_of_number >= 10):
first_digit_of_number = first_digit_of_number // 10
print(first_digit_of_number)
Output:
Enter number: 45621 4
Python code to print the first digit of a number using map()
Code:
num = int(input("Enter number: "))
digits_of_number= list(map(int, str(num)))
print(digits_of_number[0])
Output:
Enter number: 45621 4
Python code to print the first digit of a number using math function
Code:
import math
num = int(input("Enter any Number: "))
c_total = int(math.log10(num))
first_digit_of_number = int(num // math.pow(10, c_total))
print(first_digit_of_number)
Output:
Enter any Number: 9012 9
