Check whether an equation or inequality is true

True means the relation holds. Here, $3^2+4^2=9+16=25$ and $5^2=25$. To see False, clear the line, enter $3^2+4^2$, tap =, enter $6^2$ and press the equals key. $25\ne 36$, so the result is False.

The on-screen = button inserts the equality sign between the sides. The equals key records the completed check in history, together with its verdict.

For an inequality, choose a different relation button: $\ne$, $>$, $<$, $\ge$ or $\le$. Each checks the comparison you wrote.

• No Operator: you pressed the equals key on a line with no relation sign, so nothing was checked. Tap a relation button, then enter the right side. The button adds the sign at the end of the line. For $3^2+4^2$, tap = and enter $5^2$.
• Syntax ERROR after entering a power: a relation button inserts its sign inside the exponent if the cursor is still there. To enter $2^{10}>1000$, press $2$, the power key, then $1$ and $0$; press the right-arrow key once to leave the exponent, then tap > and enter $1000$. This relation gives True. The square key used above already leaves the cursor outside the exponent.
• You want an ordinary calculation: tap the VERIFY chip in the function bar (the check mark on a narrow phone) to turn Verify off. If No Operator is showing, its Turn Verify off button also calculates the line. The switch keeps its setting when you reload the page.