các str. phương thức isdigit trả về
x = input["Enter The character that you want to check for int:"]
if[ord[x] >= 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = 48 and ord[x] = '0' and x = 48 and ord[x] = 48 and ord[x]