« ans » is French for "years."
In French, the verb « avoir » (to have) is associated with years, rather than « être » (to be).
So if you see « J'ai seize ans, » this literally means, "I have 16 years," but it is understood in French as "I am 16 years old."
years
"J'ai dix-sept ans" is French for "I am seventeen years old." It literally translates to "I have seventeen years," which is how age is commonly expressed in French.
The phrase "j'ai onze ans et mon anniversaire" in French translates to "I am eleven years old and my birthday" in English. However, it is incomplete; it seems to be missing the rest of the sentence that would specify when or how the birthday is celebrated. Typically, one might say "J'ai onze ans et mon anniversaire est en [mois]" to complete the thought.
I am 15: J'ai quinze ans. If you mean 'I am 15 too', that is: J'ai quinze ans aussi. Literally it means: 'I have 15 years also', but that's the way you say it, can't change the language.
j'ai dix ans
"ans" means "years"
Sept ans means 'seven years' in French.
Ans means "Years" in French.
years
You would say "J'ai quatorze ans" to mean "I am fourteen" in French.
You would say "J'ai sept ans" in French to mean "I am seven."
I am twenty means j'ai vingt ans
ans
j'ai seize ans means 'I'm sixteen' in French.
"Il a .. ans" in French means "He is .. years old". It is used to indicate someone's age.
In French, "j'ai quinze ans" means "I am fifteen years old."
You can say "J'ai 40 ans" in French to mean "I am 40 years old."